7/28/2019 Mc Neill, d & Al -Catalogo- 5-2196 (0339) Impresion Pendiente http://slidepdf.com/reader/full/mc-neill-d-al-catalogo-5-2196-0339-impresion-pendiente 1/22 Psycholosical Review Copyright 1996 by the American Psychological Association, lnc, 1996, Vol. 103, No. 1, 34-55 0033-295X/96/$3.00 Silence Is Liberating" Removing the Handcuffs on Grammatical Expression in the Manual Modality Susan Goldin-Meadow and David McNeill University of Chicago Jenny Singleton University of Illinois at Urbana-Champaign Grammatical properties are found in conventional sign languages of the deaf and in unconventional gesture systems created by deaf children lacking language models. However, they do not arise in spontaneous gestures produced along with speech. The authors propose a model explaining when the manual modality will assume grammatical properties and when it will not. The model argues that two grammatical features, segmentation and hierarchical combination, appear in all settings in which one human communicates symbolically with another. These properties are preferentially assumed by speech whenever words are spoken, constraining the manual modality to a global form. However,when the manual modality must carry the full burden of communication, it is freed from the global form it assumes when integrated with speech--only to be constrained by the task of symbolic comm unication to take on the gramm atical properties of segmentation and hierarchical combination. Perhaps the clearest example of the robustness of language comes from the fact that language is not tied to the mouth and ear but can also be processed by the hand and eye. Sign lan- guages of the deaf have been found to take over all of the func- tions and to assume the grammatical properties characteristic of spoken languages (e.g., Klima & Bellugi, 1979). Moreover, when exposed to a conventional sign language such as Ameri- can Sign Language, deaf children acquire the language as effort- lessly as hearing children acquire spoken language (Newport & Meier, 1985). Thus, the manual modality can serve as a me- dium for language, suggesting that the capacity for creating and learning a linguistic system is modality independent. However, comm unication in the manual modality does not always as- sume languagelike properties. In particular, when hearing adults and children use their hands to gesture as they speak, those gestures do not take on the grammatical properties char- acteristic of speech (McNeill, 1992). In this article, we propose a model that explains when the Susan Goldin-Meadow and David McNeill, Department of Psychol- ogy, University of Chicagn; Jen ny Singleton, Department of Psychology, University of Illinois at Urbana-Champaign. This work was supported by Grant BNS 8810769 from the National Science Foundation, Grants RO 1 DC0049 and RO 1 DC 10561 from the National Institute on Deafness and Other Communication Disorders, grants from the Spencer Foundation, a grant from the University of Illi- nois Research Board, and Grant 5 T32 HD07307-05 from the National Institute for Child Health and Human Development. We would like to thank M. W. Alibali, A. Woodward, R. Mayberry, and G. Gigerenzer for their thoughtful comments on the manuscript; R. Glenberg and L. Grandau for their assistance in collecting data; and T. Gonzales, D. Langer, A. Li, V. Kenny, B. Soil, J. Weakland, L. Jucha, and C. Wachter for their assistance in coding and data analysis. Correspondence concerning this article should be addressed to Susan Goldin-Meadow, Department of Psychology, University of Chicago, 5730 South Woodlawn Avenue, Chicago, Illinois 60637. Electronic mail may be sent via Internet to [email protected]. 34 manual modality will assume grammatical properties and when it will not. The model argues that when communicators do not attend to their gestures, as when they gesture unwit- tingly while they speak, the manual modality plays a role in relation to speech, and its form is constrained by that relation- ship. As a result, when it accompanies speech, manual com- munication is global and mimetic in form and is not charac- terized by segmentation and hierarchical combination--two hallmarks of grammatical structure. In contrast, when com- municators are forced to rely solely on gesture, that is, when gesture is produced on its own without speech and thus itself must assume the full burden of communication, the manual modality is liberated from the constraints imposed on it by speech--only to be constrained to take on the grammatical properties essential to human language, most notably segmen- tation and hierarchical combination. We begin by describing the gestures that accompany speech, focusing on two essential points: (a) The gestures produced along with speech form, with that speech, an integrated system, and (b) the roles that gesture and speech play in this integrated system are distinct, with speech conveying information in a lin- ear and segm ented fashion and gesture conveying information in a global and noncompositional manner. We then contrast the gestures that accompany speech with a naturalistic situation in which gesture has assumed the primary burden of communica- tion and (we argue) has consequently taken on the grammatical properties that are essential to human language. Finally, we ex- perimentally test our hypothesis that gesture becomes gram- matical only when it assumes the full burden of communica- tion. We asked hearing adults to describe a series of scenes using only their hands (and not their mouths), and we contrasted these self-sufficient gestures with the gestures these sam e adults spontaneously produced when asked to describe the same scenes verbally. We found that the gestures produced without speech were characterized by the rudiments of a simple syn- tax-in particular, they were segmented and combined hierar-
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7/28/2019 Mc Neill, d & Al -Catalogo- 5-2196 (0339) Impresion Pendiente
Psycholosical Review Copyrigh t 1996 by the Am erica n Psycholog ical Association , lnc,1996 , Vol . 103 , No. 1 , 34-55 0033-29 5X/96/$ 3 .00
S i le n c e I s L ib era tin g" R e m o v i n g t h e H a n d c u f f s o n G r a m m a t i c a l
E x p r e s s io n i n th e M a n u a l M o d a l i t y
Susan Goldin-Meadow and D avid McNeillU n i v e r s i ty o f C h i c a g o
Jenn y SingletonU n i v e r s it y o f I ll i n o i s a t U r b a n a - C h a m p a i g n
Gra mm atical propert ies are found in conventional s ign languages of the de af and in unconventional
gesture systems created by dea f children lacking language models . However, they d o not ar ise in
spontaneous gestures produced along with speech. Th e authors propose a mod el explaining when
the m anual m odali ty will assume gram matical propert ies and when i t will not . The mode l arguesthat two gram matical features, segmentat ion and hierarchical combination, appea r in al l set t ings
in which one hu man comm unicates symbolical ly with another. These propert ies are preferentially
assumed by speech whenever words are spoken, con straining the m anual m odali ty to a global form.
However, when the manu al mo dali ty must carry the ful l burden of comm unicat ion, i t is f reed from
the global form i t assumes when integrated with speech --only to be constrained by the task of
symbo lic comm unicat ion to take on the g ramm atical propert ies of segmentat ion and h ierarchical
combina t ion .
P e r h a p s t h e c l e a r e s t e x a m p l e o f t h e r o b u s t n e s s o f l a n g u ag e
c o m e s f r o m t h e f a c t t h a t l a n g u a g e is n o t t i e d t o t h e m o u t h a n d
e a r b u t c a n a l so b e p r o c e s s e d b y t h e h a n d a n d e y e . S i g n l a n -
g u a g e s o f t h e d e a f h a v e b e e n f o u n d t o t a k e o v e r a ll o f t h e f u n c -
t i o n s a n d t o a s s u m e t h e g r a m m a t i c a l p r o p e r t i e s c h a r a c t e r i s t ic
o f s p o k e n l a n g u a g e s ( e . g . , K l i m a & B e l l u g i , 1 9 7 9 ) . M o r e o v e r ,
w h e n e x p o s e d t o a c o n v e n t i o n a l s i g n l a n g u a g e su c h a s A m e r i -
c a n S i g n L a n g u a g e , d e a f c h i l d r e n a c q u i r e t h e l a n g u a g e a s e f f o r t-
l e ss l y a s h e a r i n g c h i l d r e n a c q u i r e s p o k e n l a n g u a g e ( N e w p o r t &
M e i er , 1 9 8 5 ) . T h u s , t h e m a n u a l m o d a l i t y c a n s e rv e as a m e -
d i u m f o r la n g u a g e , s u g g e s t in g t h a t t h e c a p a c i t y f o r c r e a t i n g a n d
l e a r n i n g a l i n g u i s t ic s y s t e m i s m o d a l i t y i n d e p e n d e n t . H o w e v e r,
c o m m u n i c a t i o n i n t h e m a n u a l m o d a l i t y d o e s n o t a l w a y s a s -s u m e l a n g u a g el i k e p r o p e r t ie s . I n p a r t i c u l a r , w h e n h e a r i n g
a d u l t s a n d c h i l d r e n u s e t h e i r h a n d s t o g e s t u r e a s t h e y s p e a k ,
t h o s e g e st u r es d o n o t t a k e o n t h e g r a m m a t i c a l p r o p e r t i e s c h a r -
a c t e r is t i c o f s p ee c h ( M c N e i l l , 1 9 9 2 ) .
I n t h i s a r ti c l e , w e p r o p o s e a m o d e l t h a t e x p l a i n s w h e n t h e
Susan Goldin-Meadow an d D avid McNeil l, De partm ent o f Psychol-
ogy, Universi ty of Chicagn; Jen ny Singleton, D epartm ent of Psychology,
Universi ty of I l l inois at Urbana-C hamp aign.
Th is work was suppor ted by Gran t BNS 8810769 f rom the Na t iona l
Science Foundation, Gran ts RO 1 DC0049 an d RO 1 DC 10561 from the
National Inst i tute on Deafness and O ther Com municat ion Disorders ,
grants from the Spencer Founda tion, a grant from the Universi ty of I l l i -nois Research Board, and Gran t 5 T32 HD07307-05 from the NationalInst i tute for Child Health and H uma n Development.
We would l ike to thank M. W. Alibal i , A. Woodward, R. Mayberry,
and G. Gigerenzer for their thoughtful comm ents on the manusc ript ; R.Glenberg an d L. Gran dau for their assis tance in collecting data; and T.Gonzales, D . Langer, A. Li, V. Kenny, B. Soil, J. W eakland, L. Jucha,
and C. W achter for their assistance in cod ing and d ata analysis.
Correspondence concerning this article should be addre ssed to SusanGoldin-Meadow, Dep artmen t of Psychology, Universi ty of Chicago,
5730 South Woodlawn Avenue,Chicago, Illinois 60637. Electronic ma il
m a n u a l m o d a l i t y w i l l a s s u m e g r a m m a t i c a l p r o p e r t i e s a n d
w h e n i t w i ll no t . T h e m o d e l a r g u e s t h a t w h e n c o m m u n i c a t o r s
d o n o t a t t e n d t o t h e i r g e s t u r e s , a s w h e n t h e y g e s t u r e u n w i t -
t i n g l y w h i l e t h e y s p e a k , t h e m a n u a l m o d a l i t y p l a y s a r o l e i n
r e l a t i o n t o s p e e c h , a n d i t s f o r m i s c o n s t r a i n e d b y t h a t r e l a t i o n -
s h i p . A s a r e s u l t , w h e n i t a c c o m p a n i e s s p e e c h , m a n u a l c o m -
m u n i c a t i o n i s g l o b a l a n d m i m e t i c i n f o r m a n d i s n o t c h a r a c -
t e r i z e d b y s e g m e n t a t i o n a n d h i e r a r c h i c a l c o m b i n a t i o n - - t w o
h a l l m a r k s o f g r a m m a t i c a l s t r u c t u r e . I n c o n t r a s t, w h e n c o m -
m u n i c a t o r s a r e f o r c e d t o r e l y s o l e ly o n g e s t u re , t h a t i s , w h e n
g e s t u r e is p r o d u c e d o n i t s o w n w i t h o u t s p e e c h a n d t h u s i t s e l f
m u s t a s s u m e t h e f u l l b u r d e n o f c o m m u n i c a t i o n , t h e m a n u a l
m o d a l i t y is l ib e r a t e d f ro m t h e c o n s t r a i n t s i m p o s e d o n i t b ys p e e c h - - o n l y t o b e c o n s tr a i n e d t o ta k e o n t h e g r a m m a t i c a l
p r o p e r t i e s e s s e nt i al t o h u m a n l a n gu a g e , m o s t n o t a b l y s e g m e n -
t a t i o n a n d h i e r a rc h i c a l c o m b i n a t i o n .
W e b e g i n b y d e s c r i b i n g t h e g e s t u r e s t h a t a c c o m p a n y s p e e c h ,
f o c u s i n g o n t w o e s s e n t i a l p o i n t s : ( a ) T h e g e s t u r e s p r o d u c e d
a l o n g w i t h s p e e c h f o r m , w i t h t h a t s p e e c h , a n i n t e g r a t e d s y s t e m ,
a n d ( b ) t h e r o l e s t h a t g e s tu r e a n d s p e e c h p l a y i n t h i s i n t e g r a t e d
s y s t e m a r e d i s t i n c t , w i t h s p e e c h c o n v e y i n g i n f o r m a t i o n i n a l i n -
e a r a n d s e g m e n t e d f a s h i o n a n d g e s t u r e c o n v e y i n g i n f o r m a t i o n
i n a g l o b a l a n d n o n c o m p o s i t i o n a l m a n n e r . W e t h e n c o n t r a s t th e
g e s t u r es t h a t a c c o m p a n y s p e e c h w i t h a n a t u r a l i s t i c s i tu a t i o n i n
w h i c h g e s tu r e h a s a s s u m e d t h e p r i m a r y b u r d e n o f c o m m u n i c a -
t i o n a n d ( w e a r g u e ) h a s c o n s e q u e n t l y t a k e n o n t h e g r a m m a t i c a lp r o p e r t i e s t h a t a r e e s s e n ti a l t o h u m a n l a n g u a ge . F i n a l ly , w e e x -
p e r i m e n t a l l y t e s t o u r h y p o t h e s i s t h a t g e s t u r e b e c o m e s g r a m -
m a t i c a l o n l y w h e n i t a s s u m e s t h e f u l l b u r d e n o f c o m m u n i c a -
t i o n . W e a s k e d h e a r i n g a d u l t s t o d e s c r i b e a s e r ie s o f s c e ne s u s i n g
o n l y t h e i r h a n d s ( a n d n o t t h e i r m o u t h s ) , a n d w e c o n t r a s t e d
t h e s e s e l f - s u ff i c i en t g e s t u r e s w i t h t h e g e s t u r e s t h e s e s a m e a d u l t s
s p o n t a n e o u s l y p r o d u c e d w h e n a s k e d t o d e s c r i b e t h e s a m e
s c e n e s v er b a ll y . W e f o u n d t h a t t h e g e s t u r e s p r o d u c e d w i t h o u t
s p e e c h w e r e c h a r a c t e r i z e d b y t h e r u d i m e n t s o f a s i m p l e s y n -
t a x - i n p a r ti c u la r , t h e y w er e s e g m e n te d a n d c o m b i n e d h i e r a r -
7/28/2019 Mc Neill, d & Al -Catalogo- 5-2196 (0339) Impresion Pendiente
p i e , i n t h e p r e v i o u s e x a m p l e o f a n i c o n i c g e s tu r e , t h e s p e a k e r
p r o d u c e d t h e s t r o k e o f t h e g e s tu r e j u s t a s h e s a i d " b e n d s i t w a y
b a c k " ( s e e K i t a , 1 9 93 , f o r m o r e s u b t l e e x a m p l e s o f h o w s p e e c h
a n d g e s t u r e a d j u s t t o e a c h o t h e r i n t i m i n g ; M o r r e l - S a m u e l s &
K r a u s s , 1992,f o r e v i d e n c e t h a t t h e t i m i n g o f g e s t u r e a n d s p e e c h
i s re l a t e d to t h e r a t e d f a m i l i a r i t y o f t h e s p o k e n w o r d ; a n d S c o b l e
& M a y b e r r y , 1994, f o r e v id e n c e t h a t g e s t u r e a n d s p e e c h a r e s y n -
c h r o n i z e d e v e n w h e n , a s i n s t u t t e r i n g , t h e s p e e c h p r o d u c t i o n p r o -
c e s s g o e s a w r y ) . S u c h s y n c h r o n y i m p l i e s t h a t t h e s p e a k e r i s p r e -
s e n ti n g t h e s a m e m e a n i n g i n b o t h c h a n n e l s a t th e s a m e m o m e n t
a n d t h a t g e s t u r e a n d s p e e c h f o r m a s i n g le , i n t e g r a t e d s y s t e m .
Gesture an d Speech Convey Mea ning Differently
A l t h o u g h g e s t u r e a n d s p e e c h r e f e r to t h e s a m e e v e n t , th e y d o
n o t a l w a y s co n v e y p r e c is e l y t h e s a m e i n f o r m a t i o n a b o u t t h a t
e v e n t. F o r e x a m p l e , w h e n d e s c r i b i n g G r a n n y ' s c h a s e a f t e r S y l-
v e s t e r i n a c a r t o o n n a r r a t i v e , a s p e a k e r s a i d " s h e c h a s e s h i m
o u t a g a i n " w h i l e m o v i n g h e r h a n d a s t h o u g h s w i n g in g a n o b j e c t
( M c N e i l l , 1 9 9 2 ) . S p e e c h c o n v e y s t h e i d e a s o f p u r s u i t a n d r e -
c u r r e n c e , b u t g e s t u re c o n v e y s t h e w e a p o n u s e d ( a n u m b r e l l a )
d u r i n g t h e c h a s e . B o t h s p e e c h a n d g e s t u r e r e f e r t o t h e s a m ee v e n t , b u t e a c h p r e s e n t s a s o m e w h a t d i f f e r e n t a s p e c t o f i t .I
W h y a r e g e s t u re a n d s p e e c h s o e a s i ly a b l e t o t a k e d i f f e r e n t
p e r s p e ct i v es o n t h e s a m e e v e n t ? W e s u g g e s t t h a t t h e m e t h o d
u s e d b y g e s t u re f o r c o n v e y i n g m e a n i n g i s f u n d a m e n t a l l y d i ff e r-
e n t f r o m t h a t o f s p ee c h .
S p e e c h h a s t h e e f f e ct o f s e g m e n t i n g a n d l i n e a r i z i n g m e a n i n g .
W h a t m i g h t b e a n i n s t a n t a n e o u s t h o u g h t i s d i v i d e d u p a n d
s t r u n g o u t t h r o u g h t i m e . A s i n g l e e v e n t , sa y, s o m e b o d y s i t t i n g
d o w n o n a c h a i r , m u s t b e c o n v e y e d i n s e g m e n t s : t h e p e r s o n , t h e
c h a i r , t h e m o v e m e n t , t h e d i r e c t i o n , a n d s o f o r t h . T h e s e s e g -
m e n t s a r e o r g a n i z e d i n t o a h i e r a r c h i c a l l y s t r u c t u r e d s t r i n g o f
w o r d s . T h e t o t a l e f f ec t i s t o p r e s e n t w h a t h a d b e e n a s i n g l e i n -
s t a n t a n e o u s p i c t u r e i n t h e f o r m o f a s t r i n g o f s e g m e n t s . S e g-
m e n t a t i o n a n d l i n e a r i z a t i o n t o f o r m a h i e r a r c h y a r e e s s e n ti a l
c h a r a c t e r i s t i c s o f a l l l i n g u i s t i c s y s t e m s ( i n c l u d i n g s i g n l a n -
g u a g es t h a t a r e n o t s p o k e n a t a l l, s e e b e l o w ) .
D e S a u s s u r e ( 1 9 1 6 / 1 9 5 9 ) a r g u e d t h a t t h e l i n e a r - s e g m e n t e d
c h a r a c t e r o f s p o k e n l a n g u a g e i s a p r o p e r t y t h a t a r i s e s b e c a u s e
l a ng u a g e is u n i d i m e n s i o n a l b u t m e a n i n g s a r e m u l t i d i m e n s i o n a l .
L a n g u a g e c a n o n l y v a r y a l o n g t h e s in g l e d i m e n s i o n o f t i m e . A t
a l l l e v e ls ( p h o n e m e s , w o r d s , p h r a s e s , s e n t e n c e s , a n d d i s c o u r s e ) ,
l a n g u a g e d e p e n d s o n v a r i a t i o n s a lo n g t h i s o n e a x i s o f t i m e . T h i s
r e s t r i c t i o n f o r c e s l a n g u a g e to b r e a k m e a n i n g c o m p l e x e s i n t o s e g -
m e n t s a n d t o r e c o n s t r u c t m u l t i d im e n s i o n a l m e a n i n g s b y c o m -
b i n i n g t h e s e g m e n t s i n t i m e .
T h e g e s t u re s t h a t a c c o m p a n y s p e e c h a r e d i f f e re n t in t h e i r b a -
s ic o r g a n i z a ti o n . T h e y a r e t h e m s e l v e s f re e t o v a r y o n d i m e n -s i o ns o f s p a c e, t i m e , f o r m , t r a j e c to r y , a n d s o f o r t h a n d c a n p r e s -
e n t m e a n i n g c o m p l e x e s w i t h o u t u n d e r g o i n g s e g m e n t a t i o n o r
l i n e a r i z a ti o n . U n l i k e s p o k e n s e n t e n ce s i n w h i c h l o w e r c o n s t i t u -
e n t s c o m b i n e i n t o h i g h e r c o n s t i tu e n t s , e a c h g e s t u r e i s a c o m -
p l e t e ex p r e s s io n o f m e a n i n g u n t o i t s e lf ( M c N e i l l , 1 9 9 2 ) . F o r
e x a m p l e , i n d e s c r i b i n g a n i n d i v i d u a l r u n n i n g , a s p e a k e r m o v e d
h i s h a n d f o r w a r d w h i l e w i g g l i n g h i s i n d e x a n d m i d d l e f i n g er s.
T h e g e s t u r e i s a s y m b o l i n t h a t i t r e p r e s e n t s s o m e t h i n g o t h e r
t h a n i t s e l f - - t h e h a n d i s n o t a h a n d b u t a c h a r a c te r , th e m o v e -
m e n t i s n o t a h a n d i n m o t i o n b u t t h e c h a r a c t e r i n m o t i o n , t h e
s p a c e i s n o t t h e p h y s i c a l s p a c e o f t h e n a r r a t o r b u t a n a r r ~
s p a c e , t h e w i g g l i n g fi n g e rs a r e n o t f i n g er s b u t r u n n i n g 1
M o r e o v e r, t h e g e s t u r e i s a s y m b o l t h e p a r t s o f w h i c h g a i n m q
i n g b e c a u s e o f t h e m e a n i n g o f t h e w h o l e . T h e w i g g li n g f in
m e a n " r u n n i n g " o n l y b e c a u s e w e k n o w t h a t t h e g e s t u re ,
w h o l e , d e p i c t s s o m e o n e r u n n i n g a n d n o t b e c a u s e t h i s s pe l
u s e s w ig g l in g f in g e rs to m e a n r u n n i n g i n a n y o t h e r c o n t e x t
d e e d , i n o t h e r g e s t u r e s p r o d u c e d b y t h i s s a m e s p e a k e r , w ig@
f i n g er s m a y w e l l h a v e a v e r y d i f f e r e n t m e a n i n g ( e .g . , i n d e c i:
b e t w e e n t w o a l t e r n a t i v e s ) . T o a r g u e t h a t t h e w i g g l i n g f i n g e rs
t u r e i s c o m p o s e d o f s e p a r a te l y m e a n i n g f u l p a r t s , o n e w c
h a v e t o s h o w t h a t e a c h o f t h e t h r e e c o m p o n e n t s t h a t c o m ic
t h e g e s t u r e - - t h e V h a n d s h a p e , t h e w ig g l in g m o t i o n , a n d
f o r w a r d m o t i o n - - i s u s e d f o r a s t ab l e m e a n i n g a c r o s s t h e S l~
e r ' s g e s t u r a l r e p e r t o i r e . T h e d a t a s u g g e s t t h a t t h e r e i s n o s
s t a b i l it y i n t h e g e s t u re s t h a t a c c o m p a n y s p e e c h ( M c N
1 9 9 2 ) . M o r e o v er , b e c a u s e t h e s p e a k e r d o e s n o t c o n s i s te n t l y
t h e f o r m s t h a t c o n s t i t u t e t h e w i g g l i n g f i n g e rs g e s t u r e f o r s ~
m e a n i n g s , t h e g e s t u r e c a n n o t s t a n d o n i t s o w n w i t h o u t s p e e c
a n d t h i s i s c o n s i s t e n t w i t h t h e p r i n c i p l e t h a t s p e e c h a n d g e s'
f o r m a n i n t e g r a t e d s y s te m .
I n a d d i t i o n t o t h e f a c t t h a t t h e g e s t u r e s a c c o m p a n y i n g S lXd o n o t a p p e a r t o b e c o m p o s e d o f m e a n i n g f u l p ar t s a n d 1
a r e n o t w h o l e s c r e a t e d f r o m p a r t s , t h e s e g e st u r e s a l s o d o
t h e m s e l v e s c o m b i n e t o c r e a t e l a r g e r w h o l e s. M o s t o f t h e t i
g e s t u r e s a r e " o n e t o a c l a u s e , " t h a t i s , a s p o k e n c l a u s e i s a c c
p a n i e d b y a s i n g le g e s t u r e ( M c N e i l l , 1 9 9 2 ) . M o r e o v e r , e v e n t
i n g t h e t i m e s w h e n m o r e t h a n o n e g e s t u r e o c c u r s w i t h i n a s i:
c l a u se , th e g e s t u re s d o n o t c o m b i n e i n t o a m o r e c o m p l e x
t u r e " c l a u s e . " E a c h g e s t u r e d e p i c t s t h e c o n t e n t f r o m a d i f fe
a n g le , b r i n g i n g o u t a d i f fe r e n t a sp e c t o r t e m p o r a l p h a s e ,
e a c h i s a c o m p l e t e e x p r e s s i o n o f m e a n i n g b y i t s e lf . F o r e x a m
w h i l e u t t e r i n g t h e c l a u s e " a n d s h e g r a b s t h e k n i f e , " a sp e~
p r o d u c e d t w o g e s t u re s : T h e h a n d f i rs t g r o p e d i n a c i r c l e
t h e p a l m f a c in g d o w n a n d t h e f i ng e rs e x t e n d e d ( p r o d u c e d a ~
J Instances in w hich gesture and speech convey different infol
t ion in a p roblem -solving si tuat ion have been cal led mismat(Ch urch & Goldin-Meadow, 1986). Mism atches occur frequ~
when indiv iduals , part icu lar ly children, are asked to describe how
solved a task (A libal i & Goldin-Meadow, 1993; Crowder & N ewr
1993; Perry, Chur ch, & Goldin-Meadow, 1988). A t first glance,
tu re - speech mismatches migh t appear to con t rad ic t the c la im
gesture and speech form an integrated system. H owever, even the
mism atches do convey different inform ation in gesture a nd in spethey do no t v io la te the p r inc ip les o f ges tu re - speech in tegra t ion
sc r ibed in the t ex t . In pa r t i cu la r , mismatches a re semant ica l ly c
pressive in the sense that both mod ali t ies describe the sam e even1belt each taking a different perspective on that event . Considerexam ple, a chi ld in the conservation task who says that the amou~
water is different because " the glass is ta l l" wh ile indicat ing the w
of the glass with her hands. Although this chi ld is indeed expre~two different pieces of inform ation in the two mod ali t ies , she is n~
theless describing the sam e object in gesture and in speech. More,
the t im ing of the mism atch also ref lects an integra ted system.child produ ces the width gesture a s she says "tal l ," thus syn chroneexpressing her two perspectives on the glass (for fu rther evidence
mismatches a re p red ica ted on an in tegra ted ges tu re -speech sysl
see Butcher & Goldin-Meadow, 1995 ) .
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GRAM M AT I CAL E XP RE SS ION I N T HE M ANUAL M ODAL I T Y 37
w o r d " s h e " w a s u t t e r e d ) a n d t h e n t h e h a n d t u r n e d u p a n d
c l osed t o a f i st a s t hough g r i pp i ng a kn i f e ( p r oduce d a l ong wi t h
t he wor ds "g r abs t he kn i f e" ) . T he ges t u r es a r e r e l a t ed bu t do
no t com bi ne i n t o a s i ng le h i ghe r un i t cha r ac t e r i zed by t he s ame
proper t ies as a spoken clause. Rather , the ges tures present suc-
cessive snaps hots of the scene. Th e spo ken w ords a l so descr ibe
t h i s s cene , bu t wher eas t he wor ds - - " she , " "g r abs , " and " t he
k n i f e " - - -c o m b i n e o f o r m t h e c l a u se , t h e g e s tu r e s m g r o p i n g a n d
g r a b b i n g - - - d o n o t c o m b i n e t o f o r m a n y t h i n g r e s e m b l i n g a
clause. Rather , each ges ture represen ts a pre dicate u nto i tse lf .
I n s u m m a r y , th e g e s tu r e s t h a t a c c o m p a n y s p e e c h f o r m a n
i n t egr a t ed sys t em wi th t ha t speech and , w i t h i n t he ges t u r e -
speech sys tem, convey semant i c mean i ng . G es t u r e i s no t on l y
semant i ca l l y and p r agm at i ca l ly coexpr es s ive w i th speech , bu t i t
i s a lso synchr on ous w i t h speech . As a r e su lt , w hen ges t u r e i s
p r oduced a l ong wi t h speech , i t s f o r m i s cons t r a i ned by t he
f r ami ng t ha t speech p r ov i des . I n pa r t i cu l a r , ges t u r e i s con-
s t r a ined t o t ake on a g l oba l and m i met i c f o r m .
T hus , when p r oduced a l ong wi t h speech , ges t u r es do no t
a n d - - w e w o u l d a r gu e , b e c a u s e o f th e c o n s t r a in t s i m p o s e d b y
s p e e c h m c a n n o t a s s u m e t h e l i n e a r a n d s e g m e n t e d f o r m o f t h e
words they accompany. In the next sect ion, however , we wi l lshow t ha t t he m anua l m oda l i t y a t t imes can t ake on a l i nea r and
segment ed f o r m , and we wi ll a r gue t ha t i t does so when i t i s a
s p e a k e r' s so l e m e a n s o f c o m m u n i c a t i o n .
G e s t u r e s T h a t A s s u m e t h e P r i m a r y B u r d e n o f
C o m m u n i c a t i o n
W e b e g i n b y d e s c ri b in g c o m m u n i c a t i o n s y s t e m s in t h e m a n -
ua l mod a l i t y t ha t a r e cod i f ied and t ha t a r e used , and l ea r ned , a s
na t i ve languages by d ea f peop l e - - conv en t i on a l s i gn l anguages .
W e then t u r n t o t he "unco nven t i ona l " and i d i osync r a t i c ges tu r e
sys t ems i nven t ed by dea f ch i l d r en who have no t been exposed
t o conven t i ona l s ign l anguage t o com mu ni ca t e w i t h t he hea r i ng
i nd i v idua l s a r oun d t hem .
Convent ional S ign Langua ges
T he s i gn l anguages o f t he dea f a r e au t onom ous l anguages t ha t
a r e no t based on t he spoken l anguages o f hea r i ng cu l t u r es
(Bel lugi & Studder t -Kennedy, 1980; Kl ima & Bel lugi , 1979;
L ane & Gr os j ean , 1980) . A s i gn l anguage such a s Amer i can
S i gn L anguage ( AS L ) i s a p r i mar y l i ngu i s t i c sys t em pas sed
down f r om o ne gene r a t ion o f dea f peop l e to t he n ex t and i s a
language in the ful l sense of the word. L ike sp oken languages,
ASL is s t ruc tured a t synta ct ic (F ischer, 1974; Liddel l , 1980;
Li l lo-Mar t in, 1986; Padde n, 1983) , m orph ological (F ischer,
1973; F ischer & Gou gh, 1978; Kl im a & Bellugi, 1979; New por t ,1981; Supal la , 1982, 1986; Supal la & New por t , 1978) , an d
"pho nolog ical"2 (Bat t i son , 1974; Coul ter , 1990; Lane , Boyes-
Bra em , & Bellugi, 1976; Liddell , 1984; Liddel l & Joh nson ,
1986; Padden & Per lmut ter , 1987; Sandier, 1986; S toko e, 1960;
Wilbur, 1986 ) levels.
T hus , u n l i ke t he ges t u r es t ha t acc om pan y speech , t he si gns
o f A S L c o m b i n e w i t h o n e a n o t h e r t o c r e a t e l a r g e r w h o l e s, t h a t
i s, s en tences . L i ke m an y spoken l anguages, AS L h as a bas i c o r
canon i ca l wo r d / s i gn o r de r , a l t hough i t has cons i de r ab l e wor d
or de r f lex ib il it y. S ub j e c t - ve r b- o b j ec t ( S V O) i s t he un ma r ked
or de r , w i t h o t he r o r de r s pos s i b l e on l y when one o f t he cons t i t -
uen t s i s f r on t ed and ma r ked f o r top i c ( F i sche r & Gou gh , 1978;
F r i edm an , 1976; L i dde ll , 1980 ; P adden , 1983) . M or eover , and
desp i t e t he f ac t t ha t t he adu l t l anguage shows cons i de r ab l e
wor d o r de r f l ex ib il it y, wor d o r de r p l ays an i m po r t an t r o l e i n
t he ea r l y s t ages o f AS L acqu i s i t i on . D ea f ch i l d r en l ea r n i ng
A S L f r o m t h e i r d e a f p a r e n t s u s e c o n s i s te n t w o r d o r d e r a s a
syn t ac t i c dev i ce ea r l y i n deve l opment ( Hof f me i s t e r , 1978 ;
New por t & Ashb r ook , 1977; Newp or t & M eie r, 1985 ) and
t he i r p r e f e r r ed o r de r is S VO, t he canon i ca l o r de r o f t he adu l t
sys t em ( Hof f me i s t e r , 1978) .
I n add i t i on , and aga i n un l i ke t he ges t u r es t ha t accompany
s p e ec h , t h e s ig n s o f A S L a r e t h e m s e l v e s c o m p o s e d o f m e a n i n g -
f u l componen t s , t ha t i s , mor phemes . L i ke spoken l anguages ,
AS L has deve l oped g r amm at i ca l m ar ke r s t ha t s e r ve a s i nf lec -
t ional (e .g. , F ischer , 1973; F ischer & Gough, 1978; Kl ima &
Bel lugi , 1979; Met lay & Supa l la , 1995) an d der ivat iona l mo~:-
phem es ( e.g. , S upa l l a & N ewpor t , 1978 ) . I n o t he r w or ds , the r e
a r e r egu l a r changes i n bas i c f o r m as soc i a t ed w i t h sys t ema t i c
changes i n mean i ng , and t hese changes occur i n t e r na l t o a s i gn.
F o r e x a m p l e , th e A S L v e r b " a s k b o t h " i s c o m p o s e d o f tw o p a r t s
s i mul t aneous l y p r oduced : "a sk , " whi ch ( i n i t s un i n f l ec t edf or m) i s p r oduced by movi ng t he i ndex f i nge r away f r om t he
ches t a r ea ( neu t r a l space ) and bend i ng i t a s i t moves , and
" b o t h , " w h i c h i n v o l ve s p r o d u c i n g t h i s s a m e m o v e m e n t t w i ce ,
once t o t he l e f t and once t o t he f i gh t . T h i s dua l mot i on i s a
g r a m m a t i c a l m o r p h e m e ( m a r k i n g t h e n o t i o n " d u a l p e r s o n " )
t ha t can b e added t o a s e t o f ve r bs in AS L and , w hen added , i t
cons i s ten t l y con t r i bu t e s t he mean i ng " bo t h" t o t he ve r b ( K l i m a
& Bellugi, 1979 ).
N o t e t h a t t h e s i m u l t a n eo u s o c c u r r e n c e o f m o r p h e m e s w i t h i n
a sign can give an A SL sign an ic onic quali ty. However, signs in
AS L a r e no t a l ways i con ic . F or exam pl e , t he s i gn f o r " s l ow" i s
m a d e b y m o v i n g o n e h a n d a c r o s s t h e b a c k o f t h e o t h e r h a n d.
W h en t he s i gn i s modi f i ed t o be "ve r y s l ow ," i t i s ma de morerapidly because t h i s is the pa r t i cu l a r m odi f i ca t ion o f mo vem ent
as soc i a ted w i t h a n i n t ens i f ica t i on me an i ng ( K l i ma & Be l lug i,
1979) . T h us , m odi f y i ng the m ean i ng o f a s ign can r edu ce i t s
i con i c it y i n AS L s i m pl y because t he mean i ng o f the s i gn a s a
whol e i s, i n r u l e - gover ned f a sh ion , m ade u p o f t he m ean i ngs o f
t h e c o m p o n e n t s t h a t c o m p r i s e it .
I n con t r a s t , a s desc r i bed above , the ges t u r es t ha t acc om pan y
s p e e c h a r e n o t c o m p o s e d o f p a r t s b u t a r e i n s te a d n o n c o m p o -
s i t iona l whol es . Because t he ges t u r e a s a whol e m us t be a goo d
r epr esen t a t i on o f i t s r e f e r en t , the ad d i t i on o f s ema nt i c i n f o r -
ma t i on t o a spon t aneous ges t u r e a l ways i nc r eases i t s i con i c -
i t y - - i f somet h i ng i s t hough t o f a s ve r y s l ow , t he ges t u r e f o r i t i s
a l so ve r y s l ow ( M cN ei l l , 1992) . T he ges t u r e a s a whol e r epr e -
sen t s "ve r y s low" and , a l t hough o ne cou l d , i n p r inc i p l e , b r ea kup t he ge s t u r e i n t o t wo pa r t s ( e .g . , " sl ow ," a m ove me nt ac r os s
t h e b a c k o f t h e h a n d , a n d " v e r y , " a n e x a g g e r a te d a n d s lo w e d
m o v e m e n t ) , t h e r e is n o e v i d e n c e t h a t t h e s e p a r ti c u l a r f o r m s
h a v e i n d e p e n d e n t a n d c o n s i s t e n t m e a n i n g a c r o s s a r a n g e o f
g e s t u r e s - - a s t h e y w o u l d h a v e t o i f t h e y w e r e p a r t o f a m o r p h o -
l og i ca l sys t em l i ke AS L ' s.
2 This level s called phonological n sign language despite the absenc eof sound because t is composed of distinctive units that are meaninglessand contrastive, hallmarks of he phonological evel n speech.
7/28/2019 Mc Neill, d & Al -Catalogo- 5-2196 (0339) Impresion Pendiente
T hus , con ven t i ona l s ign l anguages such a s AS L , whi ch a r e
u s e d b y t h e d e a f a s t h e ir p r i m a r y c o m m u n i c a t i o n s y s te m s , e x -
h i b i t the com pl ex i t i e s o f i ngu i st ic o r gan i za t i on f ound i n a l l spo-
ken l anguages. A l t hough t he m anua l mod a l i t y p r esen t s one w i t h
t he op por t un i t y t o mi met i ca l l y dep i c t even t s a s g l oba l wholes
( a s one sees i n t he ges tu r es tha t ac com pan y speech) , w hen t he
mod a l i t y a s sumes t he f ul l bur den o f comm uni ca t i on , g l oba l
r epr esen t a t ion i s abandon ed i n f avor o f r epr esen t a t i on by pa r t s
t ha t combi ne t o f o r m a sys t em of h i e r a r ch i ca l l y a r r anged se -
q u e n c es o f l i n e a r s e g m e n ts ( i. e ., m o r p h e m e s c o m b i n e t o f o r m
s igns, whi ch , i n t u r n , c om bi ne t o f o r m sen t ences ) . W e sugges t
t ha t t h i s t ype o f segmen t ed r epr esen t a t i on a r i s e s i n s ign l an-
guage ( and no t i n spon t aneous ges t u r e ) because , i n s i gn l an-
guage , t he ma nua l m oda l i t y i t s e lf a s sumes t he p r i m ar y bur d en
o f c o m m u n i c a t io n .
S i gn languages o f t he dea f , i n add i t i on t o be i ng p r i m ar y co m-
mun i ca t i on sys t ems , a r e a l so sys t ems t ha t have h i s t o r ie s and a r e
pas sed down f r om o ne gene r a t i on o f user s to t he nex t
(Fr i shbcrg, 1975 ) . The y are cod i f ied l inguis t ic sys tem s and, in
t h i s sense , a r e ve r y d if f e ren t f r om t he ges t u r es t ha t acco mp any
speech . I n t he nex t s ec t i on , we exami ne a s i t ua t i on i n whi ch
noncod i f i ed ges tu r e i ts e l f a s sumes t he f u l l bur den o f com mu ni -ca t i on . W e ask whe t he r ges tu r es tha t t ake on t he f unc t i on o f a
p r i m a r y c o m m u n i c a t i o n s y s t e m m o r e c lo se ly r e s e m b l e i n f o r m
t he ges t u res t ha t acco mp any speech o r t he s i gns o f a conven-
tional language.
W h e n G e s tu r e I s t h e O n l y M e a n s o f C o m m u n i c a t i o n
Available
As ment i oned above , dea f ch i ld r en bo r n t o de a f pa r en t s and
exposed f r om b i r t h t o a conven t i ona l s ign l anguage such a s AS L
acqu i r e t ha t l anguage na t u r a ll y ; t ha t i s, t hese ch i l d r en p r og r es s
t h r ough s t ages in acq u i r i ng s i gn l anguage s imi l a r t o t hose o f
hear ing chi ldren acqui r ing a spoken language (Casel l i , 1983;
Hoffmeis ter , 1978; Ho ffmeis ter & Wilbur , 1980; Kan tor , 1982;
New por t & Ashbr ook , 1977; Newp or t & M ei er , 1985 ) . T hus , i n
an ap pr opr i a t e l ingu is ti c en v i r o nm ent - - i n t h i s case , a s ign ing
e n v i r o n m e n t - - d e a f c h i ld r e n a r e n o t h a n d i c a p p e d w i th r e s p e c t
to language learning.
However , 90% of dea f ch i l d r en a r e no t b or n t o dea f pa r en t s
who cou l d p r ov i de ea r l y exposur e t o a conven t i ona l s i gn l an-
guage . Ra t he r, t hey a r e bor n t o he a r i ng pa r en t s who , qu i t e na t -
u ra ll y, t end t o exp ose t he i r ch i l d ren t o speech ( Ho f f me i s t e r &
W i lbur, 1980) . Unf or t una t e l y , i t i s ex t r eme l y unc om mo n f o r
dea f ch i l d ren w i t h s eve r e t o p r o f oun d h ea r i ng l osses t o acqu i r e
t he spoken l anguage o f he i r hea r i ng pa r en t s spon t aneous l y , t ha t
i s , wi tho ut intensive and special ized ins t ruct ion. Even wi th in-
s t r uc ti on , de a f ch i l d r en ' s acqu i s it i on o f speech i s mar k ed l y de -l ayed when c om par ed e i t he r w i t h t he acqu i s i ti on o f speech by
hea t i ng ch i l d r en o f hea r i ng pa r en t s o r w i t h t he acqu i s i t ion o f
s i gn by dea f ch i ld r en o f dea f pa r en ts . B y age 5 o r 6 , and desp i t e
i n t ens i ve ea rl y t r a i n i ng p r ogr a ms , m an y p r of oun d l y dea f ch i l-
d r en have on l y a ve r y r educed o r a l l ingu i s ti c capac i t y ( Conr ad ,
1979; Mayb erry, 1992; Meadow, 1968) .
I n add i t i on , un l e s s hea r i ng pa r e n t s s end t he i r dea f ch i ld r en
t o a s choo l i n w hi ch s i gn l anguage i s used , these dea f ch i ld r en
a r e no t l i ke ly to r ece ive conven t i ona l s i gn l anguage i npu t . Un -
d e r s u c h i n o p p o r t u n e c i r c u m s t a n c e s, t h e s e d e a f c h il d r e n
m i g h t b e e x p e c t e d t o f a i l t o c o m m u n i c a t e a t a l l o r p e r h a p s t o
c o m m u n i c a t e o n l y in n o n s y m b o l i c w a ys . T h i s t u r n s o u t n o t t o
be t he case .
S t ud i es o f dea f ch i ld r en o f hea r i ng pa r en t s have shown t ha t
t hese ch i l d ren spon t aneous l y use ges t u r es ( r e f e r r ed t o a s homesigns) t o c o m m u n i c a t e , e v e n i f t h e y a r e n o t e x p o s e d t o a c o n -
vent ional s ign language model (Fant , 1972; Lenneberg, 1964;
M oor es , 1974; T e r voor t , 1961 ) . G i ven a hom e env i r on me nt i n
w h i c h f a m i l y m e m b e r s c o m m u n i c a t e w i th e a c h o t h e r th r o u g h
ma ny d i f f e ren t channe ls , one mi gh t expec t t ha t t he dea f ch i ld
woul d exp l o i t t he acces s i b l e moda l i t y ( t he manua l moda l i t y )
f o r t he pur po ses o f comm uni ca t i on . T he ques t i on we ask he r e i s
whe t he r t he ges t u r es t he ch i ld uses t o com mu ni ca t e a r e s t r uc -
tured in languagelike ways or whethe r they resem ble the global ,
nonseg ment ed g es t u res t ha t t he hea r i ng i nd i v i dua l s i n t he i r en -
v i r onm ent use a s t hey speak .
Gestures are combined into strings. G o l d i n - M e a d o w a n d
her co ll eagues ( F e l dman , Gol d i n - M eadow, & Gl e i t m an , 1978;
Gol d i n - M eadow, 1979; Gol d i n - M eadow & F e l dman , 1977;
Gol d i n - M eadow & M yl ander, 1984, 1990a) obse r ved t he hom e
s i gns o f 6 dea f ch il d r en o f hea r i ng pa r en t s i n P h i l ade l ph i a and
4 i n Chi cago and f ou nd t ha t a l l 10 ch i ld r en used ges t u r e to com -mu ni ca t e desp i t e the f ac t t ha t t hey wer e no t ex posed t o a con-
ven t i ona l si gn l anguage. T he ch i l d r en used t h r ee ma j or t ypes o f
ges tures: ( a) D eict ic ges tures were typical ly poin ts that m ain-
mi ned a cons t an t k i nes i c f o r m i n a l l con t ex t s . T hese de i c t i c s
were used to s ingle out o bjects , people , places , and the l ike . (b)
Char ac t e r i z i ng ges t u r es wer e s t y l i zed l ~ mt om i mes , t he i con i c
f o r m s o f whi ch va r i ed w i t h t he i n t ended m ean i ng o f each s i gn
( e .g . , a f is t poun ded i n t he a i r a s i f someo ne was hamm er i ng) .
Char ac t e r i z i ng ges t u r es wer e o f t en used a s p r ed i ca t e s convey i ng
act ion and at t r ibute informat ion ( i .e . , as verbs and adject ives ,
respect ively) but co uld a l so be used a s labels for objects ( i .e . , as
nou ns; see Goldin-M eadow , Butcher , Mylander, & Dod ge,
1994) . ( c ) M ar ke r ges tu r es wer e t yp ica l l y head o r hand m ove-
ment s ( e .g . , nod , headshake , o r t wo- handed " f l i p" ) t ha t a r e
conven t i ona l i zed w i t h i n t he ch i l d ' s cu l t u r e and t ha t t he ch i l -
d r en used a s m odul a t o r s ( e .g . , to a f f i r m, nega te , o r dou b t ) .
Unl i ke t he ges t u res t ha t hea r i ng adu l t s and hea r i ng ch i l d r en
pr od uce a l ong wi th speech , whi ch a r e r a r e l y com bi ned w i t h one
ano t he r , t he home- s i gn i ng dea f ch i l d r en ' s ges t u res wer e f r e -
quen t l y com bi ned i n t o s tr ings. M o t or i c c r i t e r ia wer e used t o
i sola te s tr ings of ges tures . In par t icular , in the analyse s of the
dea f ch i l d r en ' s ges t u res , t wo ges t u r es wer e cons ide r ed pa r t o f
t he s am e ges t u r e st r i ng i f t hey wer e connec t ed b y a con t i nuou s
f low of mo vem ent . I n co n t r a s t , t wo ges t u r es wer e cons i de red
d i s ti nc t , each com pr i s i ng i ts own u n i t , i f t he han d r e t r ac t ed o r
re laxed betw een the tw o ges tures.
Moreover, the c hi ldren 's ges ture s t r ings conve yed the range ofseman t i c r e l a t ions t yp i ca l l y f ound i n ea r l y ch i ld l anguage ( i n
pa r t i cu l a r , ac t i on and a t t r i bu t e r e l a t i ons ) . T he ch i l d r en com-
b i ned po i n t s w i t h o t he r po i n t s ( e .g . , a po i n t a t a t oy f o ll owed by
a po i n t a t t he t ab l e t o r eques t t ha t t he t oy b e t r ans f e r r ed to t he
t ab l e ) , po i n t s w i t h cha r ac t e r i z i ng ges t u r es ( e .g . , a po i n t a t a
bubb l e j a r f ol lowed by t he cha r ac t e r i z ing ges t u r e " t w i s t " t o
c o m m e n t o n t h e f a c t t h a t t h e ja r h a s j u s t b e e n t w is t ed o p e n ) ,
and cha r ac t e r i z i ng ges t u res w i t h o t he r cha r ac t e r i z ing ges t u r es
( a s exempl i f i ed i n t he nex t pa r ag r aph ) .
S t r ings o f cha r ac t e r i z ing ges t u r es wer e o f t wo t ypes . T h e f ir s t
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GRAMMA TI CAL EXPRESSION I N THE MANUAL MOD ALI TY 39
t ype we r e s t r i ngs i n wh i c h e a c h c ha r a c t e r i z i ng ge s t u r e r e p r e -
s e n t e d a s e pa r a t e p r opos i t i on ( e . g . , a "h i t " - c ha r a c t e r i z i ng ge s -
t u r e f o ll o w e d b y a " f a l r ' - c h a r a c t e r i z i n g g e s tu r e , u s e d t o c o m -
m e n t o n t he f a c t t ha t t he c h i l d ha d h i t t he t owe r [ a ct ~ ] a nd t he
t o w e r h a d f a ll e n [ a c t : ] ) . N o t e t h a t t h i s t y p e o f c h a r a c t e r iz i n g
+ c ha r a c t e r i z i ng s t r i ng , c onve y i ng a s i t doe s t wo p r opo s i t i ons
w i t h i n t h e b o u n d s o f a s i n g le s t r in g ( a s d e f i n e d b y t h e m o t o r i c
c r i t e r i a de s c r i be d a bo ve ) , s ugge s t s t ha t t he de a f c h i l d ' s s y s t e m
i s r e c u r s i ve ( a s y s t e m i n wh i c h a un i t c a n be u s e d t o de r i ve, by
r u l e s o f t he s y s t e m, a l onge r s tr i ng t ha t c o n t a i n s t h e o r i g i na l
u n i t ) . R e c u r s i o n i s a c e n t r a l c o m p o n e n t o f al l n a t u r a l l a n g u ag e s
a nd g ive s la ngua ge i t s ge ne r a ti ve c a pa c i t y . The s e c ond t yp e we r e
s t ri n g s i n w h i c h t h e t w o c h a r a c t e r i z i n g g e s t u re s w e r e p a r t o f t h e
s a m e p r opos i t i on , w i t h one ge s t u r e r e p r e s e n t i ng t he ve r b o f the
p r o p o s i t io n a n d t h e o t h e r r e p r es e n t i n g a n o u n w i t h i n t h a t s a m e
pr opo s i t i on ( e .g . , a n " e a t " - c h a r a c t e r i z i ng ge s t u r e f o l l owe d by a
"g i ve " - c h a r a c t e r i z i ng ge s tu r e , u s e d t o r e que s t t ha t a t oy g r a pe ,
wh i c h wa s i n f a c t i ne d i b l e , be g i ven t o t he c h i l d who t he n t h r e w
t he g r a pe r a t he r t ha n e a t i ng i t ) . I n t h i s i n s t a nc e , t he " e a t " ge s -
t u r e w a s u s e d t o i d e n t i fy a n o b j e c t a n d t h u s a p p e a r e d t o b e p l a y -
i ng a noun l i ke r o l e i n t he s t r i ng ( s e e Go l d i n - Me a dow e t a l . ,
1 9 9 4 , f o r e vi d e n c e t h a t n o u n a n d v e r b u s e s o f c h a r a c te r i z in gge s t u r e s a r e d i s t i ngu i s he d w i t h i n t he d e a f c h i l d ' s ge s t u r e s ) .
Gesture strings are structured. T h e d e a f c h i l d r e n ' s g e s tu r e
s t r i ngs s ha r e d s e ve ra l s t r uc t u r a l p r ope r t i e s w i t h e a r l y s e n t e nc e s
i n c h i l d l a ngua ge a nd , on t h i s ba s i s , wa r r a n t t he l a be l " s e n -
t e n c e ." F o r e x a m p l e , a l t h o u g h t h e c h i l d r e n d i d n o t p r o d u c e g e s -
t u r e s f o r a ll o f t he pos s i b l e t he ma t i c r o l e s t ha t c ou l d be c on -
ve ye d wi t h i n a s e n t e nc e , t he y we r e no t ha p ha z a r d i n t he i r s e le c -
t i o n o f w h i c h r o l es t o c o n v e y i n g e s t ur e . T h e c h i l d r e n w e r e m o r e
l i ke l y t o p r oduc e a ge s t u r e f o r t he pa t i e n t ( e . g . , c he e s e ) i n a
s e n t e n c e a b o u t e a t i n g t h a n t o p r o d u c e a g e s t u r e f o r t h e a c t o r
( e . g . , mous e ) . I n a dd i t i on , t he c h i l d r e n p r oduc e d ge s t u r e s f o r
t he i n t r a ns i ti ve a c t o r (e . g ., t he m ous e i n a s e n t e nc e de s c r i b i ng a
m o u s e r u n n i n g t o h i s h o l e ) as o f t e n a s t h e y p r o d u c e d g e s t u r e s
f o r the pa t i e n t ( e . g. , t he c he e s e i n a s e n t e nc e de s c r i b i ng a m ous e
e a t in g c h e e s e ) a n d f a r m o r e o f t e n t h a n t h e y p r o d u c e d g e s tu r e s
f o r t he t r a ns i ti ve a c t o r ( e .g . , t he mo us e i n a s e n t e nc e de s c r i b i ng
a m ous e e a t i ng c he e s e ) . I n t h i s wa y , t he l i ke l i hood o f p r od uc -
t i on s e r ve d t o d i s t i ngu i s h a mo ng t he m a t i c r o l e s .
A s a s e c o n d e x a m p l e o f st r u c t u r e , t h e c h i l d r e n a l s o d is t in -
g u i s h e d a m o n g t h e t h e m a t i c r o l e s th e y d i d e x p r e s s b y p l a c in g
t he ge s t u r e f o r a g i ven r o l e i n a pa r t i c u l a r p os i t i on i n a ge s t u r e
s t r i ng ; t ha t i s , t he ge s t u r e s t he c h i l d r e n p r oduc e d wi t h i n t he i r
s t r i n g s w e r e n o t p r o d u c e d i n h a p h a z a r d o r d e r b u t r a t h e r a p -
pe a r e d t o f o l l ow a s m a l l s e t o f ge s t u r e o r de r r e gu l a r i t i e s
( G o l d i n - M e a d o w , 1 9 7 9 ; G o l d i n - M e a d o w & M y l an d e r, 1 9 8 4 ) .
Ge s t u r e o r d e r r e gu l a r i ti e s de s c r i be whe r e t he ge s t u r e f o r a pa r -
t i t u l a r t he m a t i c r o l e i s li ke l y t o a p pe a r i n a ge s t u r e s t r ing . Fo re xa mp l e , ge s t u r e s f o r a n ob j e c t p l a y i ng t he pa t i e n t r o l e t e nde d
t o p r e c e d e g e s tu r e s f o r t h e a c t ; f o r e x a m p l e , t o c o m m e n t o n t h e
f a c t t h a t h e i n t e n d e d t o t h r o w a t o y g r a p e, o n e c h i l d p r o d u c e d
t h e s tr i n g " g r a p e t h r o w " w a p o i n t i n g g e s tu r e f o r t h e p a t ie n t
( g r a p e ) f o ll o w e d b y a c h a r a c t e r iz i n g g e s t u r e f o r th e a c t ( t h r o w ) .
A s a s e c o n d e x a m p l e , g e s t u re s f o r t h e a c t t e n d e d t o p r e c e d e g e s -
t u r e s f o r a n ob j e c t p l a y i ng t he r o l e o f r e c i p i e n t o r goa l ; f o r e x -
a m p l e , t o r e q u e s t t h a t a n o b j e c t b e m o v e d t o t h e t a b le , a c h i l d
p r o d u c e d t h e s t ri n g " t r a n s f e r t a b l e " - - a c h a r a c t e r i z in g g e s t u re
f o r the a c t ( t r a n s f e r ) f o l l owe d by a po i n t i ng ge s t u r e f o r t he r e -
c i p i e n t ( t a b l e ) . F i na l ly , ge s t u re s f o r a n ob j e c t p l a y i ng t he r o l e o f
pa t i e n t t e n de d t o p r e c e d e ge s t u r e s f o r t he ob j e c t p l a y i ng t he r o l e
o f re c i p ie n t ; f o r e x a m p l e , t o c o m m e n t o n t h e f a c t t h a t a t o y
duc k ha d be e n ha nde d t o h i s s i s t e r , a c h i l d p r oduc e d t he s t r i ng
" d u c k s i s t e r " - - a p o i n t i n g g e st u r e fo r t h e p a t i e n t ( d u c k ) f o l-
l owe d by a po i n t i ng ge s t u r e f o r t he r e c i p i e n t ( s i s t e r ) .
T h u s , w h e n t h e c h i l d r e n p r o d u c e d g e s tu r e s f o r t h e p a t i e n t,
a c t , o r r e c i p i e n t w i t h i n a s i ng l e s t r i ng , t he y t e nde d t o p r oduc e
t he s e ge s t u r e s a c c o r d i n g t o t he f o l l owi ng o r de r :
ge s t u r e s t r i ng -- ~ pa t i e n t - a c t - r e c i p i e n t .
I n s u m m a r y , t h e d e a f c h il d r e n c o n j o i n e d t h e g e s t u r e s th e y
p r o d u c e d i n t o s t ri n g s c h a r a c t e r iz e d b y g e s t u r e o r d e r r e g u l a ri -
t i e s a s we ll a s by l i ke l i hood o f p r o duc t i on r e gu l a r it i e s . Th e ge s -
t u r e s t ri n g s c o u l d t h e re f o r e b e s a i d t o c o n f o r m t o a s y n t a x , a l-
be i t a s i mp l e one .
Gestures are themselves composed o f parts. T h e d e a f c h il -
d r e n ' s g e s t u r e s n o t o n l y f o r m e d p a r t s o f lo n g e r s e n t e n c e u n i t s
b u t t h e y t h e m s e l v e s w e r e m a d e u p o f s m a l l e r p a r ts . F o r e x a m -
p l e, t o r e q u e s t t h e e x p e r i m e n t e r t o l a y a p e n n y d o w n f i a t o n a
t o y , o n e d e a f c h i l d p r o d u c e d a d o w n w a r d m o t i o n w i t h h i s h a n ds ha p e d l i ke a n O . I n i t s e l f t h i s c ou l d be a g l oba l ge s t u r e p r e s e n t -
i n g t h e s h a p e a n d t r a j e c t o r y as a n u n a n a l y z e d w h o l e . T h e e x -
p e r i m e n t e r p r e t e n d e d n o t t o u n d e r s t a n d a n d , a f t er s ev e ra l r e p e -
t i ti ons , t he c h i l d f a c t o r e d t he ge s t u r e i n t o i t s c om pon e n t s : F i r s t
he s t a ti c a l l y he l d up t he ge s t u r e f o r a r ou nd ob j e c t ( t he O h a nd
s h a p e ) a n d t h e n , q u i t e d e l i b er a te l y a n d w i t h h i s h a n d n o l o n g e r
i n t h e O s h a p e b u t e x h i b i ti n g a f l at p a l m , m a d e t h e t r a j e c t o r y
f o r d o w n w a r d m o v e m e n t . T h e o r i g i n a l g e s t u re w a s t h u s d e c o m -
p o s e d i n t o t w o e l e m e n t s . T h i s e x a m p l e i m p l i e s t h e p r e s e n c e o f
a s y s t e m o f l i ng u i s ti c s e g m e n t s i n w h i c h t h e c o m p l e x m e a n i n g
o f " r o u n d + t h i n g + m o v i n g + d o w n w a r d " is b r o k e n i n to c o m -
p o n e n t s a n d t h e c o m p o n e n t s c o m b i n e d i n t o a ge s tu r e . T h e e x -
p e r i m e n t e r ' s f e i g n e d la c k o f u n d e r s t a n d i n g m a y h a v e b e e n i n -
s t r um e n t a l i n ge t t ing t he c h i l d t o f a c t o r h is ge s t u r e i n t o p a r t s a tt ha t pa r t i c u l a r mome n t . Howe ve r , t he po i n t we s t r e s s he r e i s
t ha t , whe n t he ge s t u r e wa s b r oke n i n t o pa r t s , t hos e pa r t s c on -
f o r m e d t o a w i d e r s y s te m , o n e t h a t a c c o u n t e d f o r th e v a s t m a -
j o r i t y o f g e s t u re s p r o d u c e d b y t h i s p a r t i c u l a r c h i ld ( G o l d i n -
M e a d o w & M y l a n d e r, 1 9 9 0 b ) . T h u s , t h e d e a f c h i l d ' s g e s t u r e s - -
u n l i k e t h e s p o n t a n e o u s g e s t i c u la t i o ns o f h e a r i n g a d u l t s a n d c h i l-
d r e n - a r e t h em s e l ve s c o m p o s e d o f s im p l e r ge s tu r e e le m e n t s ?
T h e p a r t i c u l a r c o m b i n a t i o n d e s c r i b e d a b o v e w a s o n e a m o n g
m a n y i n t he de a f c h i l d ' s ge s t u r e s y s t e m, f o r inde e d t h i s c h i l d , a s
we ll a s 3 o t he r s whos e ge s t u r e s ha ve be e n a na l yz e d f o r c om po -
n e n t s , h a d e a c h d e v i s e d a m o r p h o l o g i c a l s y s t e m ( G o l d i n -
Me a dow & Myl a nde r , 1990b ; Go l d i n - Me a dow, Myl a nde r , &
Bu t c he r , 1995 ) . Sys t e m a t i c c om pos i t i on a l i t y o f ge s t u r e s w i t h i n
3 It is possible that speakers who gesture in contexts in w hich speech
is present bu t no t fully audible would demonstrate a similar process offactoring their gestures as they sp eak --for exam ple, in Tim es Square at
the height o f the N ew Year 's Eve frenzy. However, we suspect that, b e-cause of the t ightly timed arrangement that gesture maintains w ith thespeech it accompanies (cf. Kita, 1993; McN eill, 1992 , speakers in sucha situation w ould factor their gestures into component parts only if theyalso factored their speech into parts ( or if they gave up and stoppedtalking altogether).
7/28/2019 Mc Neill, d & Al -Catalogo- 5-2196 (0339) Impresion Pendiente
G R A M M A T I C A L E X P R ES S IO N I N T H E M A N U A L M O D A L I T Y 4 1
T h e m a n u a l m o d a l i t y c a n , h o w ev e r, a s s u m e t h i s f o r m , a n d i t
d o e s s o w h e n i t s e rv e s a s a p r i m a r y c o m m u n i c a t i o n s y s t e m , a s
i n t h e c o n v e n t i o n a l s i g n l a n g u ag e s o f t h e d e a f o r t h e i d i o s y n -
c r a t i c g e s t u r e s y s t e m s u s e d b y d e a f c h i l d r e n o f h e a r i n g p a r e n t s
w h o u s e g e s t u r e a s t h e i r s o l e m e a n s o f c o m m u n i c a t i o n . T h e s e
f i n di n g s s u g g es t t h a t c o m b i n a t o r i a l s t r u c t u r e a t m o r e t h a n o n e
l e v e l ( i . e . , w i t h i n - w o r d a n d a c r o s s - w o r d s t r u c t u r e ) i s f u n d a -
m e n t a l t o h u m a n l a n g u a g e - - s o f u n d a m e n t a l t h a t i t w il l a r i s e in
h u m a n l a n g u a g e s t h a t a r e p r o d u c e d i n a n o t h e r m o d a l i t y , t h e
m a n u a l m o d a l i t y , e v e n i n t h o s e m a n u a l s y s t e m s d e v e l o p e d w i t h -
o u t a c c e ss t o a c o n v e n t i o n a l l a n g u a g e m o d e l . 4 T h u s , h i e r a r c h i -
c a l c o m b i n a t o r i a l s t r u c t u r e i s n o t f o r c e d o n l a n g u a g e b y t h e
m o d a l i t y in w h i c h i t i s p r o d u c e d , n o r i s i t m a i n t a i n e d a s a u n i -
v e r sa l p r o p e r t y o f l a n g u a g e s o l e ly b y h i s t o r i c a l t r a d i t io n .
W e e x p l o r e h e r e t h e h y p o t h e s i s t h a t s e g m e n t e d a n d h i e r a r c h i -
c a l c o m b i n a t o r i a l s t r u c t u r e w i l l a r i s e s p o n t a n e o u s ly , a t l e a s t i n
t h e m a n u a l m o d a l i t y , w h e n g e s t u r e i s r e q u i r e d t o c a r r y t h e p r i -
m a r y b u r d e n o f c o m m u n i c a t i o n , b u t n o t w h e n g e s t u re i s us e d
i n r e l a t i o n t o s p e e c h . T o t e s t t h is h y p o t h e s i s , w e c o n d u c t e d a n
e x p e r i m e n t i n w h i c h h e a r i n g a d u l t s w e r e a s k e d t o d e s c r i b e a
s e r ie s o f sc e n e s w i th a n d w i t h o u t s p e e c h . W e p r e d i c t e d t h a t t h e
g e s t u re s th e a d u l t s w o u l d p r o d u c e w i t h o u t s p e e c h w o u l d b e s e g -m e n t e d a n d h i e r a r c h i c a l l y c o m b i n a t o r i a l a n d , a s s u c h , w o u l d
b e d i s t i n c t f r o m t h e g e s t u re s th e s e s a m e a d u l t s w o u l d p r o d u c e
w h e n t h e y d e s c r i b e d t h e s c e n e s v e r b al l y .
The S t imulus for a S tu dy o f Ges ture With and WithoutSpeech
T o e x p l o r e th e w a y i n w h i c h i n d i v i d u a l s u se g e s t u r e w i t h a n d
w i t h o u t s p e e c h , w e n e e d e d a s t i m u l u s t h a t w o u l d e v o k e c o m -
m u n i c a t i o n u n d e r b o t h c o n d i t i o n s . W e c h o s e t o u s e t h e V e r b s o f
M o t i o n P r o d u c t i o n ( V M P ) t e s t d e v e l o p e d b y S u p a l l a ( 1 9 8 2 ;
s e e a l s o S u p a l l a e t a l . , i n p r e s s ) t o a s s es s k n o w l e d g e o f v e r b s o f
m o t i o n i n n a t i v e A S L s i g n e rs . T h i s t e s t is c o m p o s e d o f a s e ri e s
o f u n r e l a t e d s c e n e s i n w h i c h s m a l l o b j e c t s m o v e a c r o s s s p a c e .
T h e t e s t i n v o l v e s n o c o n v e n t i o n a l l a n g u a g e ( i . e . , n e i t h e r s i g n
n o r s p e e c h ) a n d t h u s c o u l d e a s i l y b e a d a p t e d f o r u s e w i t h i n d i -
v i d u a l s w h o a r e n o t f a m i l i a r w i t h A S L , a n d c o u l d b e u s e d t o
e l i c i t g e s t u r e w i t h o u t s p e e c h a s w e l l a s g e s t u r e w i t h s p e e c h . W e
b e g i n w i t h a d e s c r i p t i o n o f t h e s t r u c t u r e o f v er b s o f m o t i o n i n
A S L i n g e n e r a l , a n d t h e V M P t e s t i n p a r t i c u l a r .
Verbs of motion in ASL. R e s e a rc h o n s t e m - f o r m a t i o n p r o -
c e s se s h a s f o u n d A S L t o b e c o m p a r a b l e t o t h o s e s p o k e n l a n -
g u a g e s t h a t a r e m o r p h o l o g i c a l l y q u i t e c o m p l e x . T h i s r e s e a r c h
h a s f o c u s e d o n s i g n s t h a t a r e h i g h l y m i m e t i c i n f o r m ( a s c o n -
t r a s t e d w i t h t h e " f r o z e n " s i g n s o f A S L t h a t a r e l i s t ed i n A S L
d i c t i o n a r i e s a s s i n g l e - m o r p h e m e s t e m s ) . M i m e t i c s i g n s i n A S L
w e r e o r i g i n a l ly t h o u g h t t o b e b u i l t o n a n a n a l o g u s e o f m o v e -m e n t a n d s p a c e i n w h i c h m o v e m e n t i s m a p p e d i n a c o n t i n u o u s
r a t h e r t h a n a d i s c r e t e f a s h i o n ( C o h e n , N a m i r , & S c h l e s i n g e r ,
1 9 77 ; D e M a t t e o , 1 9 7 7 ) . I n o t h e r w o r d s , m i m e t i c s i g n s w e r e
t h o u g h t n o t t o b e d i v is i b l e i n t o c o m p o n e n t p a r t s , b u t r a t h e r
w e r e c o n s i d e r ed u n a n a l y z a b l e l e x i c a l i t e m s t h a t m a p p e d , a s
w h o l e s , o n t o e v e n t s i n t h e w o r l d ( a n d , a s s u c h , w o u l d h a v e b e e n
c o m p a r a b l e t o t h e g e s tu r e s t h a t a c c o m p a n y s p e e c h ) . H o w e v e r,
m o r e r e c e n t r e s e a r c h h a s sh o w n t h e s e m i m e t i c s i g n s t o b e c o m -
p o s e d o f c o m b i n a t i o n s o f a l i m i t e d s e t o f d i sc r e t e m o r p h e m e s
( M c D o n a l d , 1 9 8 2 ; N e w p o r t , 1 9 8 1 ; S c h i c k , 1 9 8 7 , 1 9 9 0 ; S u -
p a l l a , 1 9 8 2 ) . F o r e x a m p l e , t o d e s c r i b e a d r u n k ' s w e a v i n g w a l k
d o w n a p a t h , a n A S L s i g n e r w o u l d n o t r e p r e s e n t t h e i d i o s y n -
c r a s ie s o f t h e d r u n k ' s p a r t i c u l a r m e a n d e r i n g s , b u t w o u l d i n -
s t e a d u se a c o n v e n t i o n a l m o r p h e m e r e p r e s e n t i n g r a n d o m
m o v e m e n t ( i .e . , a s id e - t o - s id e m o t i o n ) i n c o n j u n c t i o n w i t h a
c o n v e n t i o n a l m o r p h e m e r e p r e s e n t i n g c h a n g e o f l o c a t i o n .
The VMP test. N e w p o r t a n d S u p a l l a ( 1 9 9 2 ; N e w p o r t ,
1 9 9 0 ) h av e s h o w n t h a t v e r b s o f m o t i o n i n A S L c o n t a i n a s m a n ya s s ix s i m u l t a n e o u s l y p r o d u c e d m o r p h e m e s a f f ix e d o n a s i n g l e
v e r b s t e m . S u p a l l a ( 1 9 8 2 ) d e s i g n e d t h e V M P t e s t t o e x p l o r e t h e
t y p e s o f m o r p h e m e s t h a t c o n s t it u t e t he p r i m a r y m o r p h o l o g y o f
A S L v e r b s o f m o t i o n ( f i ve m o t i o n a n d l o c a t i o n a n d t w o h a n d
s h a p e m o r p h e m e s ) . E v e r y A S L v e r b o f m o t i o n r e q u ir e s a t l ea s t
a c e n t r a l o b j e c t h a n d s h a p e m o r p h e m e ( i n d i c a t i n g t h e c l a ss o f
t h e o b j e c t t h a t i s m o v i n g , i . e ., i ts c a t e g o r y [ e . g . , a h u m a n o r a
v e h i c le ] o r i t s s h a p e [ e . g. , r o u n d o r s t r a i g h t ] ) a n d a r o o t m o t i o n
m o r p h e m e ( i n d i c a t i n g t h e t y p e o f p a t h t r a v e r s e d b y t h e m o v i n g
o b j e c t ; e . g. , a l i n e a r p a t h , a n a r c e d p a t h , o r a c i r c l e ) . F o r e x a m -
p l e, t h e r o o t m o r p h e m e " l i n e a r p a t h " ( r e p r e s en t i n g c ha n g e o f
l o c a t i o n al o n g a s t r a ig h t p a t h ) c a n b e c o m b i n e d w i t h o n e o f
m a n y p o s s i b l e c e n t r a l o b j e c t m o r p h e m e s r e p r e s e n t i n g t h e m o v -
i n g o b j e c t (e . g ., b e n t V = a s m a l l a n i m a l ; t h u m b p o i n t i n g u p
w i t h t h e i n d e x a n d m i d d l e f in g e rs e x t e n d e d = a v e h i c l e ) . T h e s e
c o m b i n a t i o n s c r e a t e a s e t o f s i g n s f o r w h i c h t h e m e a n i n g s a r e
p r e d i c t a b l e f r o m t h e m e a n i n g s o f t h e i n d i v i d u a l m o t i o n a n d
h a n d s h a p e m o r p h e m e s ( i . e ., a s m a l l a n i m a l m o v e s a l o n g a
s t r a i g h t p a t h o r a v e h i c l e m o v e s a lo n g a s t r a i g h t p a t h ) . A l o n g
w i t h t h e r o o t a n d c e n t r a l o b j e c t m o r p h e m e s t h a t a r e r e q u i s i t e
i n e v e r y v e rb o f m o t i o n , t h e v e r b m a y a l s o c o n t a i n a m o r p h e m e
f o r a s e c o n d a r y o b j e c t . F o r e x a m p l e , i f t h e v e h i c l e h a n d s h a p e
w e r e a d d e d t o t h e r o o t a n d c e n t r a l o b j e c t m o r p h e m e s i n t h e
p r e v i o u s e x a m p l e , t h e r e s u l t i n g m e a n i n g w o u l d b e " a s m a l l a n -
i m a l m o v e s a l o n g a s t r a ig h t p a t h i n r e l a t i o n t o a v e h i c le . "
T h e V M P t e s t is c o m p o s e d o f 1 2 0 s h o r t- f i l m e d e v e n t s o f t o y
p e o p l e a n d o b j e c t s t h a t m o v e i n. v a r y i n g p a t h s a n d m a n n e r s o f
m o t i o n ; f o r e x a m p l e , a d o l l u m p i n g i n t o a h o o p o r a r o b o t m o v -
i n g p a s t a m o t o r c y c l e . T h e t e s t i t e m s a r e e a c h c o n s t r u c t e d t o
e l i c i t a s i n g l e v e r b o f m o t i o n .
4 Although the dea f children in Goldin-M eadow 'sstudies were devel-
oping their gesture systems without direct access to a usable conven-
t ional language model , they were using their gestures to com mun icate
with hearing individuals who did have knowledge of a conventional lan-
guage. The hearing parents o f the dea f children m ight have select ively
reinforced part icular gestural c omb inations that the ir chi ldren began
using on a t r ial-an d-error basis . I f so, the s tructure found in the dea f
children 's gestures would be at tr ibu table to the children 's hearing par-ents (who did have a conventional language) and not to the ch ildren
(who d id n o t have such a m ode l ) . However, in a s tu dy o f s ix moth er -
child dyads, Goldin-M eadow and Mylander (1983, 1984) found that
the hearing m others did n ot respon d to their dea f chi ldren 's gesturestrings on the basis of the o rder in w hich the gestures in tho se strings
were produced. Th e m others were as l ikely to respond to s trings that
conform ed to the child 's predom inant gesture order pat tern as they were.
to respon d to s tr ings that did no t conform to this pat tern. These f indings
suggest tha t m aterna l responsiveness, and th us a conventional language
mode l by proxy, was not shaping the s tructural pat terns found in thedeaf children 's gestures.
7/28/2019 Mc Neill, d & Al -Catalogo- 5-2196 (0339) Impresion Pendiente
4 2 G O L D I N - M E A D O W , M c N E I L L , A N D S I N G L E T O N
Method
Participants and procedure. Si x t e e n h e a r i n g a d u l t s p a r t i c i p a t e d i n
t h e s tu dy . N o n e o f t h e h e a r i n g p a r t i c i p a n ts h a d k n o w l e d ge o f A S L o r
a n y o t h e r s i g n l a n g u a g e . Th e a d u l t s w e re a l l s t u d e n t s a t t h e U n i v e rs i t y
o f C h i c a g o a n d w e r e r e c r u i t e d t h r o u g h s i g n - up s h e e t s d i s tr i b u t e d i n
p sy c h o lo g y c la s se s o r p o s t e d i n v a r i o u s c a m p u s b u i l d i n g s . We p re s e n t e d
e a c h p a r t i c i p a n t w i t h 4 0 s e g m e n t s f r o m t h e V M P t e s t se l e c te d s o t h a t
h a l f c o n t a i n e d a s i n g le m o v i n g o b j e c t a n d h a l f c o n t a i n e d o n e o b j e c t
mo v i n g in re l a t i o n t o a s e c o n d o b j e c t . Th e t e s t wa s a d m i n i s t e re d b y t h e
s a m e e x p e r i m e n t e r ( J e n n y S i n g l e to n ) f o r a l l p a r ti c i p a n t s i n a q u i e t
r o o m a t t h e U n i v e r s it y o f C h i c a g o a n d w a s v i d e o ta p e d . E a c h p a r t i ci -
p a n t w a s f ir s t a s k e d t o v i e w t h e s e g m e n t s a n d d e s c r i b e t h e m ; n o m e n t i o n
wa s ma d e o f g e s t u re fo r t h i s f ir s t p a s s t h ro u g h t h e se g me n t s , a l t h o u g h i t
wa s a n t i c i p a t e d t h a t g e s t u r i n g wo u l d o c c u r sp o n t a n e o u s l y ( t h e g e s t u re
+ sp e e c h c o n d i t i o n ) . Th e p a r t i c i p a n t wa s t h e n a sk e d t o v i e w t h e se g -
m e n t s a g a i n , t h i s t i m e u s i n g g e s t u re a n d n o s p e e c h t o d e p i c t w h a t h a p -
p e n e d i n e a c h s e g m e n t ( t h e g e s t ur e c o n d i t i o n ) .
Coding the form of individual gestures. Th e v a s t ma j o r i t y o f g e s -
t u r e s p r o d u c e d i n b o t h c o n d i t i o n s w e re i c o n i c. T h e o c c a s io n a l m e t a -
p h o r i c g e s t u re o r b e a t p ro d u c e d i n t h e g e s t u re + sp e e c h c o n d i t i o n wa s
d e sc r i b e d b u t n o t i n c l u d e d i n fu r t h e r a n a ly se s . Ea c h o f t h e g e s t u re s p ro -
d u c e d i n t h e t w o c o n d i t i o n s w a s d e s c r ib e d a l o n g t w o d i m e n s i o n s u s i n g
c a t e g o r i e s e s t a b l i sh e d b y Su p a l l a ( 1 9 8 2 ) : t h e sh a p e o f t h e h a n d a n dt h e t r a j e c to r y o f t h e m o t i o n . F o r e x a m p l e , t o d e s c r ib e a c i r c l e m o v i n g
d i a g o n a l l y a c ro ss t h e v i d e o sc re e n , o n e p a r t i c i p a n t sh a p e d h i s i n d e x
f i n ge r a n d t h u m b i n t o a c i rc l e a n d mo v e d t h e c i rc l e f ro m t h e l e f t, a t
wa i s t le v el , u p a n d a c ro ss t o t h e r i g h t , a t e y e l ev e l. Th e h a n d s h a p e w a s
c o n s i de r e d a n O a n d t h e m o t i o n w a s c o n s i d e re d a l i n e a r p a t h .
W e r e l ie d o n c h a n g e s i n t h e s h a p e o f t h e h a n d o r i n t h e t r a j e c t o r y o f
t h e m o t i o n t o d e t e r m i n e w h e t h e r a p a r t i c u l a r h a n d s h a p e a n d m o t i o n
c o m b i n a t i o n f o r m e d a s i ng l e g e s tu r e ( a s i n t h e p r e c e d i n g e x a m p l e ) o r
t wo g e s t u re s . Fo r e x a mp l e , w h e n d e sc r i b i n g t h e c i rc l e mo v i n g a c ro ss t h e
v i d e o sc re e n , i f t h e p a r t i c i p a n t h e l d h i s O-sh a p e d h a n d i n sp a c e b u t ,
b e f o re m o v i n g h i s h a n d i n a l i n e a r p a th , c h a n g e d h i s h a n d s h a p e f r o m
a n O t o a n i n d e x f i n g e r p o i n t , we wo u l d a t t r i b u t e t o t h e p a r t i c i p a n t t wo
g e s tu r e s ( t h e O - h a n d h e l d i n s p a c e a n d t h e p o i n t m o v e d i n a l i n e a r p a t h )
r a t h e r t h a n o n e .
Coding strings of gestures. I f m o r e t h a n o n e g e s t u re w a s p r o d u c e dt o d e sc r i b e a p a r t i c u l a r s c e n e , we d e t e rmi n e d wh e t h e r t h o se g e s t u re s
we re c o n n e c t e d i n t o a s t r i n g u s i n g t h e fo l l o wi n g c r i t e r i o n . Two g e s t u re s
we re c o n s i d e re d p a r t o f t h e sa m e g e s t u re s t r i n g i f t h e y we re c o n n e c t e d
b y a c o n t i n u o u s f lo w o f mo v e me n t . Two g e s t u re s we re c o n s i d e re d d i s -
t i n c t, e a c h c o m p r i s i n g it s o w n u n i t , i f t h e h a n d r e t r a c t e d o r r e l a x e d o r i f
t h e re wa s a p a u se l o n g e r t h a n o n e se c o n d b e t w e e n t h e t wo g e s t u re s . Fo r
e x a mp l e , i f t h e p a r t i c i p a n t h e l d a n O h a n d s h a p e i n p l a c e a t c h e s t l e ve l
a n d t h e n , w i t h o u t d r o p p i n g h i s h a n d o r p a u s i n g, m o v e d a p o i n t i n g h a n d
d i a g o n a l l y f ro m l e f t t o r i g h t , t h e t wo g e s t u re s wo u l d b e c o n s i d e re d t o
c o n s t i t u t e a g e s t u re s t r i n g . I f, h o we ve r , t h e p a r t i c i p a n t r e l a x e d h i s h a n d
b e fo re p ro d u c i n g t h e d i a g o n a l g e s t u re o r p a u se d fo r l o n g e r t h a n o n e
se c o n d t h e t wo g e s t u re s wo u l d b e c o n s i d e re d se p a ra t e u n i t s . Th e sa m e
c r i te r i a w e r e u s e d t o d e t e r m i n e g e s t u r e c o n n e c t e d n e s s i n b o t h c o n d i -
t i o n s . As a re su l t , wh e t h e r o r n o t t w o g e s t u re s we re p ro d u c e d a l o n g wi t h
a s i n g le sp o k e n c l a u se i n t h e g e s tu re + sp e e c h c o n d i t i o n d i d n o t c o n -t r i b u t e a t a l l t o o u r d e c i s i o n a s t o wh e t h e r t h o se t wo g e s t u re s we re c o n -
n e c t e d ; i n d e e d , we ma d e t h e se d e c i s i o n s wi t h t h e so u n d t u rn e d o f f.
Coding the meaning of individual gestures. In a d d i t i o n t o c o d i n g
d e c i s i o n s i n v o l v i n g t h e fo rm o f t h e g e s t u re , we a l so ma d e c o d i n g d e c i -
s i o n s in v o l v i n g m e a n i n g s a n d a t t r i b u t e d m e a n i n g t o e a c h o f t h e i c o n i c
g e s t u re s p ro d u c e d i n t h e t wo c o n d i t i o n s . We c o d e d t h e g e s t u re s i n t h e
g e s t u re + sp e e c h c o n d i t i o n wi t h t h e so u n d t u rn e d o f f, b u t , i n b o t h c o n -
d i t i o n s , we k n e w w h i c h sc e n e t h e p a r t i c i p a n t wa s d e sc r i b i n g a n d c o d e d
t h e g e s tu re s i n re l a t i o n t o t h a t s c e n e . Th re e se m a n t i c e l e me n t s a p p e a re d
i n t h e sc e n e s a n d c o u l d , i n p r i n c i p l e , b e c o n v e y e d g e s t u ra l l y - - t h e a c -
t i o n , t h e mo v i n g o b je c t , a n d t h e s t a t i o n a r y o b j e c t .
I f th e p a r t i c i p a n t p r o d u c e d a m o v e m e n t t h a t c a p t u r e d a n y a s p e c t o f
t h e m o t i o n p o r t r a y e d i n t h e s c e n e, t h e g e s t u r e w a s a s s u m e d t o r e p r e s e n t
t h e a c t i o n i n t h e sc e n e a n d w a s c o n se q u e n t l y l a b e l e d action. F o r e x a m -
p l e , if , t o d e s c r ib e a d o l t j u m p i n g i n t o a h o o p , t h e p a r t i c i p a n t a r c e d h e r
h a n d f r o m P o i n t 1 t o P o i n t 2 , t h e g e s t u r e w a s co n s i d e r ed a s y m b o l f o r
t h e m o t i o n a n d t h u s a n a c t i o n g e s tu r e .
A s d e s c r i b e d a b o v e, h a l f o f t h e s c e n e s s h o w n t o e a c h p a r t i c i p a n t i n -
v o l v e d a s i n g l e o b j e c t m o v i n g i n sp a c e (e .g . , a wi n d -u p t o y b i r d ro l l s
a c r o s s t h e s c r e e n ) , a n d h a l f n v o l v e d tw o o b j e c t s , o n e m o v i n g i n r e l a t i o nt o t h e o t h e r ( e .g . , a r o b o t m o v e s p a s t a m o t o r c y c l e ). F o r b o t h t h e o n e -
o b j e c t a n d t h e t w o - o b j e c t sc e n es , i f t h e p a r t i c i p a n t p r o d u c e d a g e s t u r e
t h a t c a p t u r e d a n a s p e c t o f t h e o b j e c t t h a t w a s m o v i n g i n t h e s c e n e , i t w a s
a s s u m e d t o r e p r e s e n t t h a t o b j e c t a n d w a s c o n s e q u e n t l y l a b el e d moving
object. Fo r e x a m p l e , i f , to d e sc r i b e a d o l l wi t h c u r l y h a i r wa l k i n g a c ro ss
t h e s c r e e n, t h e p a r t i c i p a n t m o v e d b o t h h a n d s i n c u r l l i k e sh a p e s a t t h e
s i d e o f h e r h e a d , t h a t g e s t u re wa s c o n s i d e re d t o b e a sy m b o l fo r t h e d o l l ,
a n d t h u s a m o v i n g o b j e c t g e s t u re .
F o r t h e t w o - o b j e c t sc e n es , i f t h e p a r t i c i p a n t p r o d u c e d a g e s t u r e t h a t
c a p t u r e d a n a s p e c t o f t h e o b j e c t th a t d i d n o t m o v e i n t h e s c e n e, i t w a s
a s s u m e d t o r e p r e s e n t t h a t o b j e c t a n d w a s c o n s e q u e n tl y l a b e le d station-
ary object. F o r e x a m p l e , i f, t o d e s c r i b e t h e d o l l j u m p i n g i n t o t h e h o o p ,
t h e p a r t i c i p a n t s h a p e d h i s i n d e x f in g e r a n d t h u m b i n t o a c i rc l e, h o l d i n g
t h e sh a p e a t c h e s t l e v e l, t h a t g e s t u re wa s c o n s i d e re d t o b e a sy mb o l fo r
t h e h o o p , a n d t h u s a s t a t i o n a r y o b j e c t g e s t u re .Coding object information incorporated into the action. A t t i m e s ,
t h e h a n d s h a p e o f t h e a c t i o n g e s t u r e p o r t r a y e d a n a s p e c t o f e i th e r t h e
m o v i n g o b j e c t o r t h e s t a t i o n a r y o b j e c t . F o r e x a m p l e , t o d e s c r i b e a c i r -
c l e m o v i n g d i a g o n al l y a c r o s s t h e s c r e e n , o n e p a r t i c i p a n t s h a p e d h e r
i n d e x f i n ge r a n d t h u m b i n t o a c i r c l e a n d m o v e d t h e c i r c l e f r o m l e f t to
r i g h t a n d u p w a r d . B e c a u s e i t c o n v e y e d t h e m o v e m e n t i n t h e s c e n e ,
t h e g e s t u r e w a s c o n s i d e r e d t o b e a n a c t i o n . H o w e v er , t h e g e s t u re d i d
i n c o r p o r a t e i n f o r m a t i o n a b o u t t h e c i r c l e, t h e m o v i n g o b je c t , a n d w a s
c o n s e q u e n t l y c la s s if i e d a s a n a c t i o n t h a t h a d m o v i n g o b j e c t i n f o r m a -
t i o n i n c o r p o r a t e d i n t o i t s f o r m . A s a n e x a m p l e o f i n c o r p o r a t i o n o f
t h e s t a t i o n a r y o b j e c t , to d e s c r i b e t h e d o l l j u m p i n g i n t o a h o o p , o n e
p a r t i c i p a n t m o v e d h e r r i g h t i n d e x f i n g e r a c r o s s s p a c e a n d i n t o h e r l e f t
h a n d , s h a p e d a s a c i r c le . T h e g e s t u r e w a s c o n s i d e r e d t o b e a n a c t i o n
b u t , b e c a u s e i t c o n v e y e d i n f o r m a t i o n a b o u t t h e c i r c le , t h i s t im e p l a y-
i n g t h e r o l e o f t h e s t a t i o n a r y o b j e c t , t h e a c t i o n g e s t u r e w a s c l a ss i f ie d a si n c o r p o r a t i n g t h e s t a t i o n a r y o b j e c t .
Reliabili ty of the coding decisions. C o d e r s w e r e t r a i n e d t o t r a n -
s c r i b e t h e f o r m a n d m e a n i n g o f t h e g e s t u r e s a c c o r d i n g t o a s y s t e m
a d a p t e d f r o m t w o s o u r c e s - - S u p a l l a ' s ( 1 9 8 2 ) s y s t e m f o r c o d i n g s i g n e d
l a n g u a g e s a n d M c Ne i l l ' s (1 9 9 2 ) sy s t e m fo r c o d i n g g e s t i c u l a t i o n . In -
t e rc o d e r re l i a b i l i t y wa s c a l c u l a t e d b e t we e n a p a i r o f c o d e rs b l i n d t o t h e
h y p o t h e se s o f t h e s t u d y o n a su b se t o f t h e d a t a . R e l i a b i l i ty wa s a s ses se d
se p a ra t e l y fo r t h e g e s tu re c o n d i t i o n a n d t h e g e s t u re + sp e e c h c o n d i t i o n .
Fo r d e sc r i b i n g t h e fo rm o f i n d i v i d u a l g e s t u re s ( i n c l u d i n g d e c i s i o n s
a b o u t w h e t h e r a h a n d s h a p e / m o t i o n c o m b i n a t io n f o r m e d o n e o r t w o
g e s t u re s ) , r e l i a b i l i t y wa s 8 5 % a g r e e m e n t i n t h e g e s t u re c o n d i t i o n a n d
8 0 % i n t h e g e s t u re + sp e e c h c o n d i t i o n . F o r d e c i d i n g wh e t h e r t wo g e s-
t u re s we re c o n n e c t e d i n t o a s t r i n g , r e l i a b i l it y wa s t 0 0 % i n t h e g e s t u re
c o n d i t i o n a n d 9 3 % i n t h e g e s t u re + sp e e c h c o n d i t i o n . Fo r c l a s s i fy in g a
g e s t u re a s e i t h e r a n a c t i o n , a mo v i n g o b j e c t, o r a s t a t i o n a ry o b j e c t , r e l i-a b i l i t y wa s 8 5 % i n t h e g e s t u re c o n d i t i o n a n d 1 0 0 % i n t h e g e s t u re +
sp e e c h c o n d i t i o n . F i n a l ly , fo r d e c i d i n g wh e t h e r a n a c t i o n i n c o rp o ra t e d
i n f o r m a t i o n a b o u t a n o b j e c t i n t o i t s f o r m , r e l i a b il i ty w a s 9 8 % i n t h e
g e s t u re c o n d i t i o n a n d 1 0 0% i n t h e g e s t u re + sp e e c h c o n d i t i o n . Th e d a t a
we re a n a l y z e d u s i n g p a i re d t t es t s , c o m p a r i n g re sp o n se s i n t h e g e s t u re
c o n d i t i o n wi t h t h o se i n t h e g e s t u re + sp e e c h c o n d i t i o n .
Results
N o t s u r p r i s in g l y , p a r t i c i p a n t s w e r e m o r e l i k e ly t o p r o d u c e
m o r e g e s t u r e s i n t h e g e s t u r e c o n d i t i o n , i n w h i c h t h e y w e r e s p e -
7/28/2019 Mc Neill, d & Al -Catalogo- 5-2196 (0339) Impresion Pendiente
Figure 1. The m ean propo rtion of semantic elements conveyed in the gesture + speech condition and the
gesture condition. The proportion for each semantic element reflects the number of responses that con-
rained a gesture for tha t sem antic element, divid ed by the tota l numb er of gestured responses in which th e
element could have been conveyed. In bo th conditions, partici pants produc ed gestures for a sizable propor-
tion of each of the three elements. S = stationa ry object; M = moving object; A = action. Th e error bars
reflect the sta ndard error.
c i f ica l ly inst ruc ted to do so , than in the gesture + speech condi-
t ion , in which gesture was not ment ioned in the task inst ruc-
t ions. The par t ic ipants pr oduc ed gestures for a ll 40 of the scenes
in the gesture condi t ion , bu t for only an average of 19 .4 of the
scenes in the gesture + speech condi t io n ( range f rom 8-37, SD
= 10.22). As a resu l t , the to ta l numb er o f gestures prod uced in
the gesture condi t ion (M = 96 .9 , SD = 47.6) was grea te r than
the to ta l number produced in the gesture + speech condi t ion
(M = 3 8 .6 , SD = 29.7) . However , in both the gesture and the
gesture + speech condi t ions, when par t ic ipants d id produ ce
gestures , they tended to pro duce m ore than one gesture (as op-
posed to just one) per response ; on average , par t ic ipants pro-
duced 2 .4 (SD = 1 .2) gestures per response in the gesture con-
di t ion and 1 .8 gestures per response (SD = 0 .54) in the gesture
+ speech condi t ion . Because par t ic ipants d id not pro duce ges-
tures for every scene in the gesture + speech condi t ion , and be-
cause we a re par t icu la r ly in te rested in com parison s of how par-
t ic ipants used the gestures they d id produce , we ana lyzed the
da ta in the gesture versus gesture + speech condi t ions as pro-
p o r t i o n s o f th e r e sp o n se s e ac h p a r t i c ip a n t p ro d u c e d th a t i n -
c luded gestures (see be low).
Sem antic elements conveyed in gesture. We b e g in b y e x a m-
in ing how of ten par t ic ipants conveyed in gesture each of the
th re e se ma n t i c e l e me n t s - - th e a c t io n , t h e mo v in g o b je c t , a n d
th e s t a t i o n a ry o b je c t - - i n t h e tw o c o n d i ti o n s . F ig u re 1 pre se n t sthe mean propor t ion of gestures for ac t ions, moving objec ts ,
and sta t ionary objec ts produced by par t ic ipants in the gesture
+ speech condi t ion and the gesture condi t ion . The proport ion
for each semant ic e lem ent re f lects the num ber of responses tha t
conta ined a gesture for tha t semant ic e lement , d iv ided by the
to ta l num ber o f responses in which the e lemen t could have been
conveyed. Thus, for the gesture condi t ion in which a l l par t ic i -
pants p rodu ced a t least some gestures in a l l 40 scenes, the de-
nom ina to r was 40 for the moving objec t and the ac t ion (becaus e
both a re involved in a l l 40 of the scen es-- the o ne-objec t scenes
as wel l as the two-objec t scenes) and 20 for the s ta t ionary objec t
(because they were involved only in the two-objec t scenes) . For
the gesture + speech condi t ion , the denomi na to r for each indi-
v id u a l d i ff e red a n d d e p e n d e d o n th e p a r t i c u l a r n u mb e r o f o n e -
objec t and two-objec t scenes for which tha t par t ic ipant pro-
duced any gestures a t a l l.
As can be seen in Figu re 1 , par t ic ip ants were very l ike ly to
represent the a c t ion in the i r gestures in both condi t ions; a l l o f
the responses in the gesture condi t ion conta ined ac t ions, as d id
84% of the gestured responses in the gesture + speech condi t ion .
The objec ts involved in the ac t ion were less f requent ly repre-
sented in gesture in b oth condi t ions, but s t i l l found fa i r ly of ten ;
52% and 63% o f the responses in the gesture condi t ion con-
ta ined gestures for moving objec ts and sta t ionary objec ts , re -
spect ively , as d id 30% and 49% of gestured respon ses in the ges-
ture + speech condi t ion , respect ively . Each o f the three sem an-
t ic e lements was more l ike ly to be ges tured in the gesture
condi t ion than in the gesture + speech condi t ion . This d i f fe r-
ence was significant for actions, t(1 5) = 3.53, p = .003, and
moving objec ts , t (15) = 2 .98 , p = .009, but not for s ta t ionary
objects, t(1 5) = 1.14, p = .27, n s. However, wh at is par ticu larl y
impressive is not the d i f fe rences be tween the two condi t ions but
the s imi la r i t ies . Par t ic ipants in both the gesture and the gesture
• + speech condi t ions used gesture to convey substant ive infor-
mat ion about the semant ic e lements in the scenes and, in bothcondi t ions, they d id so re la t ive ly f requently . Moreover , the pa t -
te rn of produc t ion was the same in the two condi t ions. Par t ic i -
pants in both the gesture and the gesture + speech condi t ions
p ro d u c e d mo re g e s tu re s fo r a c ti o n s t h a n fo r s t a t i o n ary o b je c t s
and more gestures for s ta t ionary objec ts than for moving ob-
jec ts . We next con sider the form tha t the gestures for these se -
ma n t i c e l e me n t s t o o k in t h e tw o c o n d i t i o n s.
Sema ntic elem ents conveyed in gestur e strings. In the ges-
ture + speech condi t ion , par t ic ipan ts tended to produc e the ges-
tures for the i r semant ic e lements as s ingle uni ts ; tha t i s , they
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Figure 2. The types of deme nts comb ined within a single gesture strin g in the gesture + speech condition
and the gesture condition. T he figure presents the mean num ber o f responses containing a partic ular com-
binatio n of elements within a string, as a prop ortion o f the total n umbe r of relevant responses contain inggestures. Relevant responses includ ed the gestured responses to b oth the one-object an d the two-object
scenes for A + M combinations, but only the gestured responses to the two-object scenes for the A + S andthe A + M + S combinations. Participan ts were more likely to prod uce their gestures for semanti c elements
in strings (i.e., concatenated into units larger than the gesture itself) in the gesture condition than in the
gesture + speech condition. S = sta tionary object; M = m oving object; A = action. Th e error bars reflectthe stand ard error.
ra re ly connec ted the gesture for a semant ic e lement wi th an-
other gesture in a gesture s t r ing . Eighty- two percent of the se -
mant ic e lements (ac t ions, moving objec ts , and sta t ionary
objec ts) tha t were conveyed in gesture in the gesture + speech
condi t ion ( i .e . , the sema nt ic e lements tha t w ere gestured in the
gesture + speech condi t ion o f Figure 1 ) were conveyed as s ingle
gestures , unconnec ted to any o ther gestures. In contrast , in the
gesture condi t ion , only 36% of the seman t ic e lements tha t were
conveyed in gesture were conveyed as s ingle, uncon nec ted ges-
tures , t( 15 ) = 5.32, p < .0001.
This f ind ing- - tha t par t ic ipa nts were s ignif icant ly less l ike ly
to conjo in the i r gestures for semant ic e lements in to s t r ings in
the gesture + speech condi t ion than in the gesture con di t ion --
is par t icu la r ly s t r ik ing because as descr ibed above , par t ic ip ants
of ten produced more than one gesture per response in the ges-
ture + speech condi t ion and thus d id have the opportuni ty to
conjo in the i r gestures for semant ic e lements in to s t r ings. In-
deed , and most te l l ing , even i f we rest r ic t our ana lysis only to
those responses in which two or mo re e lemen ts were gestured ,
we st i l l f ind tha t p ar t ic ipan ts were less l ikely to conjo in the i r
gestures in to s t r ings in the gesture + speech condi t ion than inthe gesture condi t ion; 53% o f the responses tha t had more t han
o n e se ma n t i c e l e me n t c o n ta in e d no conjo ined st r ings in the ges-
ture + speech condi t ion versus 3% in the gesture condi t ion ,
t ( 15 ) = 5 .74, p < .0001. Th us, a l though par t ic ipa nts produce d
a lmost as many gestures for ac t ions, moving objec ts , and sta -
t ionary objec ts in the gesture + speech condi t ion as in the ges-
ture cond i t ion (c f. Figure 1 ) , they infrequent ly produc ed those
e lements in gesture s tr ings in the gesture + speech condi t ion .
F ig u re 2 d e sc r ib e s th e p a r t i c u l a r c o mb in a t io n s o f e l e me n t s
found in the gesture s t r ings the par t ic ip ants produc ed in each o f
the two condi t ions. Th e f igure, presents the num ber of responses
conta in ing a par t ic u la r combin a t ion o f e lements in a s t r ing , as a
p ro p o r t i o n o f t h e t o t a l n u mb e r o f r e l e va n t r e spo n se s c o n ta in in g
gestures tha t were produ ced in the two condi t ions. The denom -
ina tor for the gesture condi t ion in Figure 2 was 40 for s t r ings
c o n ta in in g th e mo v in g o b je c t a n d th e a c t io n (b e c a u se b o th a re
involved in a l l 40 o f the sce nes- - the one-objec t scenes as wel l
as the two-objec t scenes) and 20 for s t r ings conta in ing the s ta -
t iona ry objec t and the ac t ion , and for s t r ings conta in ing the s ta -
t ionary objec t , the moving objec t , and the ac t ion (because the
sta t ionary objec t was involved only in the two-o bjec t scenes) .
For the gesture + speech condi t ion , the denom ina tor for each
in d iv id u a l d i ff e red a n d d e p e n d e d o n th e p a r t i c u l a r n u mb e r o f
one-objec t and two-objec t scenes for which tha t par t ic ipant
produced any gestures a t a l l . Par t ic ipants produced signif i -
cant ly more s t r ings in the gesture condi t ion than in the gesture
+ speech condi t ion for a ll th ree types of s t r ing comb ina t ions ---
s t r ings conta in ing three e lements , the ac t ion , the mo ving objec t ,
and the s ta t ionary objec t (38% in the gesture condi t ion vs. 3%
in the gesture + speech condi t ion) , t (15 ) = 5 .05 , p < .000 l -
and both types of s t r ings conta in ing two e lements , the ac t ionand the moving objec t (30% vs. 7%), t ( 15) = 4 .63 , p < .0001,
and the ac t ion and the s ta t ionary objec t ( 18% vs. 9%), t ( 15) =
2.24, p = .04.
The order of semantic e lem ents in ges ture s tr ings . A s F ig u re
2 indica tes , par t ic ipants tended to produce the i r gestures in
st r ings re la tive ly of ten , par t icu la r ly in the gesture condi t ion . We
next asked whether they were l ike ly to p lace gestures for par t ic -
u la r semant ic e lements in par t icu la r posi t ions wi th in the i r
s t r ings; tha t i s , could the i r gesture s t r ings be cha rac te r ized by a
simple syntax? Figure 3 presents the numb er of s t r ings conta in-
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Figure3. The mean num ber of strings produced in t he gesture condi-tion (uppe r graph) and the gesture + speech condition (lower grap h),
categorized according to the order o f elements produced. Participants
were more likely to produce their gestures in a consistent order in th egesture condition than in the gesture + speech condition. Moreover, h e
consistent gesture orders found in the gesture condition did n ot con formto canonical word order in English. S = stationary object; M = moving
object; A = action. The "O ther" category, which is marked by an aster-isk in bo th graphs, includes the othe r five orders in which these threeelements could have been produced (i.e., MSA , SAM, MAS, ASM, andAMS). The error bars reflect the standard error.
ing part icular e lements categorized according to the order of
those e lements for part ic ipants in the ges ture condit ion (up per
graph) and for part ic ipants in the ges ture + speech condit ion
(lower graph ).
Look ing f i rs t a t the ges ture condit ion, we found th at part ic-ipan t s p roduced m ore s t r ings fo l lowing the m oving ob jec t -ac -
t ion (MA) orde r than fo l lowing the ac t ion-m oving ob jec t
(A M ) order ( 12.67 vs . 0 .13) , t ( t 4) = 5.94, p < .0001 (center
ba rs o f the uppe r g raph in F igure 3 ) . Indeed , 13 o f the 15 pa r -
t i c ipan t s who pro duced s t r ings con ta in ing ac t ions and m oving
objec t s p roduced som e s t r ings wi th an MA orde r and none
with an AM order; 1 part ic ipa nt p rodu ced 10 s tr ings wit h an
MA order and only 1 with an A M order. The las t of the 15
pa r t i c ipan t s p ro duced one exem pla r in each o rde r . These da ta
suggest that part ic ipan ts were fol lowing an a l l -or-none p at tern
when o rde r ing the e lem ents o f the i r ges tu re s t rings ra the r than
a probabil is t ic one. Such a l l -or-none pat terns are characteris -
t i c o f na tu ra l l anguage .
Part ic ipants a lso produ ced more s tr ings fol lowing the s ta t ion-
ary object-ac t ion (SA ) order than fol lowing the act ion-s ta t ion-
ary object (AS) order (3.73 vs . 0 .07), t (1 4) = 4.99, p < .0001
(bars o n the left s ide of the upper grap h in F igure 3) . Fou rteen
of the 15 part ic ipants wh o produ ced s tr ings containing act ions
and s ta t ionary ob jects prod uced some s tr ings with an SA order
and none with an AS order; the las t part ic ipant produced one
s tr ing with an AS order and n one w ith an SA order. Again, par-
t ic ipants appeared to fol low an a l l -or-none ra ther than a pro ba-
bilistic pattern .
F inally, part ic ipants pro duce d mor e s tr ings fol lowing the s ta-
t iona ry ob jec t -m oving ob jec t -ac t ion (S M A) orde r than s t rings
fol lowing any of the other f ive poss ible orders o f these three e le-
men ts (6.08 vs. 2.17), t( 11 ) = 3.33, p = .007 (b ars on the right
s ide of the upper gra ph in F igure 3) . Eleven of the 12 part ic i-
pants who p rodu ced s tr ings containing act ions, moving objects,
and s ta tiona ry ob jec ts p roduced m ore s t rings with an S MA or -
der than with an y o f the other f ive poss ible orders ; in fact , 6
produced no s t rings o r no m ore than one s t r ing in any o f theother five orders. The last of the 12 particip ants p rod uce d five
s tr ings with an SM A order bu t seven with an MSA order. Thus ,
when p art ic ipants p rodu ced s tr ings of gestures in the ges ture
condit ion, they produ ced those ges tures in part icular orders ac-
cording to the semantic e lemen t represented b y each ges ture .
Not e that one o f the ges ture orders fol lowed by part ic ipants
in the ges tu re cond i t ion co nform ed to an Engli sh pa t t e rn - - th e
MA order that is reminiscent o f what w ould be a subject-verb
order in English (e.g. , "the girl jumps in to the hoop" ) . Given
this fact, i t may n ot be surpris ing that a l l of the few s tr ings con-
ta ining act ions and moving objects that part ic ipants produced
in the ges ture + speech condit ion (which were produc ed a long
with spoken English) a lso conformed to the English-l ike MA
order ra ther than the non-English AM order (2.56 vs . 0 .00),
t (8) = 3.00, p = .017 (see the center bars of the lower graph in
Figure 3) .
However, the other two orders that part ic ipants prod uced in
the ges ture condit ion ( i .e . , SA: "ho op jump," and SM A: "ho op
gir l ju m p " ) do n o t con form to a canon ical o rde r in Engli sh .
Perhaps n ot unrela tedly, part ic ipants p rodu ced very few str ings
containing these combina t ions o f e lements in the ges ture +
speech condit ion, and the few they did produce were not or-
dered as in the ges ture condit ion. In the ges ture + speech con-
di t ion, part ic ipants produ ced a small numb er of st r ings con-
ta ining act ions and s ta t ionary o bjects (cf . F igure 2) and, in to-
ta l , 7 part ic ipants produced s ix s t r ings conforming to the SA
order and four con form ing to the A S order (bars on the left sideof the lower graph in F igure 3) . They a lso produ ced v ery few
strings containing a l l three e lements in the ges ture + speech
condit ion (cf . F igure 2) and, in tota l , 5 part ic ipants prod uced
only one st r ing in the S MA orde r and four in the MAS orde r
(the order most l ike English, e .g . , " the gir l jumps into the
hoop "; bars on the r igh t s ide of the lower graph in F igure 3) .
In summ ary, part ic ipants in the ges ture + speech condit ion
rarely concatenated their ges tures into s t r ings and, when they
did, their s t r ings conf orme d to a canonical order in English. In
contras t , part ic ipants in the ges ture condit ion frequently con-
7/28/2019 Mc Neill, d & Al -Catalogo- 5-2196 (0339) Impresion Pendiente
1988). It is a distinction that Sapir ( 1921, p. 119) considered to
be essential to the "life of language" and thus one that might be
expected to appear in the gestures o f participants in the gesture
condition, if indeed they were using their gestures in a lan-
guagelike manner.Incorporating a moving object or stationary object into the
act ion. Besidesproducing a separate lexical gesture (i.e., lexi-
calization, a syntactic device based on regularities across ges-
tures within a string), the participants used one other device to
represent the moving or stationary object in a gesture str ing --
they incorporated a hand shape that captured aspects of the ob-
ject into the gesture for the action. This device is reminiscent of
morphological structure, based on regularities within the ges-
ture itself. For example, to describe a circle moving diagonally
across the video screen, several participants produced a diago-
nal movement across space (an action) using a circle hand
shape rather than an index finger, thus "incorporating" the
shape of the moving object into the action gesture (the action
could either occur alone or conjoined with other gestures in a
string). Participants were more likely to incorporate informa-
tion about an object into the action in the gesture condition
than in the gesture + speech condition; 84% of the objects that
could be mentioned in the gesture condition were conveyed by
incorporation, compared with 35% in the gesture + speech con-
dition, t(15) = 5.99,p < .0001.
Moreover, in the gesture condition, participants appeared to
use the device of incorporation into actions, in conjunction
with the lexicalization device, to ensure that all of the semantic
elements that could be conveyed in a string were in fact con-
veyed. Limiting our analysis to responses containing action ges-
tures, Figure 4 shows the proportion of action gestures describ-
ing one-object scenes in which the moving object was explicitlyconveyed in gesture for both the gesture + speech and the ges-
ture conditions. In this figure, an object could be conveyed ei-
ther by a separate lexical gesture produced in a string along with
the action gesture (lexicalization) or by incorporating hand
shape information about the object into the action gesture
(incorporation). The figure also presents, for the two condi-
tions, the proportion of action gestures describing two-object
scenes in which both the moving object and the stationary ob-
ject were explicitly conveyed in gesture (either by lexicalization
or by incorporation).
Figure 4 reveals that, using either incorporation or lexicaliza-
tion, part icipants conveyed 99% of the single objects in the one-
object scenes and 95% of both objects in the two-objects scenes
in the gesture condition. In other words, almost all relevant ob-
jects were conveyed in every gesture response produced by par-
ticipants in the gesture condition. In contrast, in the gesture +
speech condition, participants conveyed 52% of the single ob-
jects in the one-object scenes and only 12% of both objects in
the two-object scenes, significantly fewer than in the gesture
condition, t(15) = 5.16, p < .0001 for the one-object scenes,
and t( 15 ) = 16.02, p < .0001 for the two-object scenes.
At times, participants used both incorporation and lexicali-
zation to redundantly convey a particular object, and they did
so more often in the gesture condition than in the gesture +
speech condition. Thirty-nine percent o f the moving and sta-
tionary objects that could be conveyed in the gesture responses
produced in the gesture condition were conveyed by both incor-
poration and lexicalization, compared with only 7% in the ges-
ture + speech condition, t( 15) = 5.00, p < .0001. Thus, part ic-
ipants tended to make use of redundancy, an impor tant prop-
erty in all natural languages, in the gestures they produced in
the gesture condition but rarely in the gestures they producedin the gesture + speech condition. 5
G e s t ur e W i t h S p e e ch a n d W i t h o u t I t: A S u m m a r y
Before beginning our study of gesture produced alone versus
gesture produced with speech, we examined the contrast in a
naturalistic communication situation. We found that deaf chil-
dren who have not yet been exposed to a conventional sign lan-
guage and who use gesture as their sole means of communica-
tion develop a system o f gestures characterized by hierarchical
levels of organization, with structure both across and within
gestures. In contrast, the hearing mothers of these deaf children,
who also use gesture but always in conjunction with speech,
do no t develop such structures; their gestures represent eventsglobally and in a noncombinatorie fashion.
We then tested the robustness of this contrast by studying
the gestures created by naive adults responding to videotaped
stimuli under experimental conditions. The gestures of he hear-
ing adults in our study were found to resemble the gestures o f
the deaf children when the adults were instructed to use only
gesture in their responses (the gesture condition). In contrast,
the gestures of the adults resembled the gestures of he deaf chil-
dren 's hearing mothers and other hearing adults when the adults
were asked to respond with speech and no mention was made
of gesture (the gesture + speech condition).
Specifically, in the gesture condition, the adults frequently
combined their gestures into strings and those strings were re-liably ordered, with gestures for certain semantic elements oc-
curring in particular positions in the string (i.e., structure
across gestures a t the sentence level). In addition, the verblike
action gestures the adults produced in the gesture condition
5Note, however, hat the information conveyed n the gestures pro-duced in the gesture + speech condition could be (and frequently was)redundant with information expressed in speech; hat is, in the gesture+ speech condition, redundancycould be found either within speech oracross gesture and speech, but not within gesture.
7/28/2019 Mc Neill, d & Al -Catalogo- 5-2196 (0339) Impresion Pendiente
Figure 4. The mean proportion of action gestures for which relevant objects were explicitly conveyed ingesture in the gesture + speech condition and in the gesture condition. Relevant objects included bo th themoving object and the stationary object fo r the actions describing two-object scenes (i.e., two relevant
objects) bu t only the moving object for the actions describing one-object scenes (i.e., one relevant object).An object was considered to be conveyed in gesture ifa separate gesture for the object was produced within
the gesture string containing the action gesture (lexicalization) or if hand shape information representingthe object was incorporated into the action gesture (incorporation). Participants consistently conveyed allof the relevant objects within a gesture string (either by lexicalization or by incorporation) in the gesturecondition but not in the gesture + speech condition. The er ror bars reflect the standard error.
could be sa id to be divisible into hand shape and m otion parts ,
wi th the hand shape o f the ac t ion f requen t ly convey ing info r -
matio n abou t the objects in i ts semantic frame (i . e ., s t ructu re
within the ges ture a t the w ord level) . By us ing the two devices
they deve loped fo r convey ing the ob jec ts in the s cenes J lex i -
cal izat ion ( in which a separate ges ture is produced to convey
the object , akin to a syntact ic device) and incorporat ion ( in
which a par t o f the act ion ges ture , the hand shape, is used to
convey the ob jec t , ak in to a m orpho log ica l dev ice ) - - the
adults co nveyed essent ia l ly a l l of the re levant objects in the
scenes in the ges ture condit ion. Indeed, fa ir ly often in this con-
di t ion, they conveyed an object redundantly, us ing both lexi-
cal izat ion and incorporat ion.
In contras t , a l though the adul ts did prod uce ges tures for ac-
t ions and objects in the ges ture + speech cond it io n-- and d id so
almost as often as they did in the ges ture condit ion (cf . F igure
1 )m th ey rare ly combine d the ges tures for these e lements into
s trings; 82% o f the e lements they conv eyed were conveyed as
single gestures. In other wo rds, they did n ot use their gestures as
bui lding blocks for a larger uni t . In addi t ion, w hen they did use
s tr ings in the ges ture + speech condit ion, the adul ts produce dthe ges tures in those s tr ings in an order reminiscent of canonical
English order. They did not order their gestures in non-English
pat tern s--pat te rns that were found in the ges ture orders of the
s tr ings they produced in the ges ture condit ion. F inal ly, the
adults used incorporat ion to convey objects less often in the
ges ture + speech condit ion than in the ges ture condit ion, a lmost
never us ing incorporat ion redundantly with lexical izat ion to
convey an object , and rare ly us ing the two devices in conc ert to
convey both objects in the two-object scenes. Thus , the parts o f
their gestures were not used system atically with o ther aspects of
the ges tures to conve y information, suggest ing that these parts
may not have funct ioned as independent uni ts in this condition.
In summary, the ges tures produced by the hearing adults in
the ges ture condit ion of our s tudy and those produ ced by the
deaf chi ldren in Goldin-M eadow's s tudies were characterized
by the propert ies of segmentat ion and hierarchical combin a-
t ion. In contras t , the ges tures produc ed b y the hearing adults in
the ges ture + speech condit ion of our s tudy and those prod uced
by the hearing m others o f the dea f chi ldren a long with their
speech were not . We explore the propert ies of segmentat ion and
comb inat ion in the next sect ion, focus ing on the condit ions that
fos ter their app earance.
T h e R e s i l i e nc e o f G r a m m a t i c a l P r o p e rt i e s:
S e g m e n t a ti o n a n d C o m b i n a t i o n i n S y m b o li c H u m a n
C o m m u n i c a t i o n
The Resilience o f Segmentation and Hierarchical
Combination
In previous work, Goldin-M eadow (1 982) identif ied segmen-ta t ion and hierarchical combin at ion as "res i lient propert ies" of
l inguis t ic sys tems--propert ies that appear even when the con-
di t ions of language acquisi t ion va ry great ly from the condit ions
chi ldren typical ly experience. Segmentat ion an d com binat ion
are found in a chi ld ' s communicat ions even when the chi ld is
lacking a conventional language model (Go ldin-Me adow & M y-
lander, 1990 a), when the language mode l that the child does
have is degenerate (S ingle ton & New port , 1992), or when the
child is first exposed to a language model after puberty, well
beyond the age language acquis i t ion typical ly begins (Curt iss,
7/28/2019 Mc Neill, d & Al -Catalogo- 5-2196 (0339) Impresion Pendiente
1977; Go l d i n - M e a dow , 1978 ; Ne w por t , 1990 ) . The s e p r ope r -
t ie s t h u s a p p e a r t o b e o v e r d e t e r m i n e d i n c h i l d c o m m u n i c a t i o n ,
w i t h a va r i e t y o f t r a je c t o r i e s l e a d i ng t o t he i r de ve l opm e n t .
T h e f i n d i n g s o f th e p r e s e n t s t u d y i n d i c a t e t h a t s e g m e n t a t i o n
a n d h i e r a r c h i c a l c o m b i n a t i o n a l s o a p p e a r i n t h e g e s tu r e s c r e -
a t e d b y h e a r i n g a d u l t s a s k e d t o a b a n d o n s p e e c h a n d u s e o n l y
t h e ir h a n d s t o c o m m u n i c a t e . T h e a p p e a r a n c e o f th e s e p r o p er -
t i e s i n t he he a r i ng a du l t s ' g e s t u r e s i s pa r t i c u l a r l y s t r i k i ng be -
c a u s e t h e y a r e n o t p r o p e r t i e s t y p i c a l ly f o u n d i n t h e g e s t u r e s
h e a r i n g a d u l t s u s e o n a d a i l y b as i s. E v e n m o r e i m p r e s s iv e i s t h e
f a c t t h a t t h e s e p r o p e r t i e s a p p e a r e d immediately n t h e a d u l t s '
g e s tu r e s. W i t h e s s e n ti a ll y n o t i m e f o r re f l e c ti o n o n w h a t m i g h t
b e f u n d a m e n t a l t o l a n g u a g e l i k e c o m m u n i c a t i o n , w h e n a s k e d
t o u s e o n l y t h e i r h a n d s t o c o m m u n i c a t e , t h e a d u l t s i n o u r s t u d y
p r o d u c e d g e s t u r e s c h a r a c t e r i z e d b y s e g m e n t a t i o n a n d h i e r a r -
c h i c a l c o m b i n a t i o n . T h e s e p r o p e r t i e s t h u s a p p e a r t o b e r e s il -
i e n t i n a ll s y m b o l i c h u m a n c o m m u n i c a t i o n , a n d n o t j u s t c h i l d
s ys t e ms .
W ha t i s t he s ou r c e o f t he l i ngu i st i c p r ope r t i e s t ha t a pp e a r i n
t h e g e s tu r e s u s e d b y t h e a d u l t s i n t h e g e s t u r e c o n d i t i o n ( b u t n o t
t h e g e s tu r e + s p e e c h c o n d i t i o n ) i n o u r e x p e r i m e n t a n d i n t h e
g e s tu r e s u s e d b y t h e d e a f c h i ld r e n i n G o l d i n - M e a d o w ' s s t u d i es ?T h e m o d a l i t y i t s e lf o b v i o u s ly c a n n o t e x p l a in t h e s e p r o p e r t ie s
be c a us e t he m oda l i t y i s he l d c ons t a n t a c r o s s a l l o f t he s e s i t ua -
t i ons , eve n t he ge s t u r e + s pe e c h c ond i t i on . I n a dd i t i on , t r a n s f e r s
f r om s pe e c h ( i .e ., mo de l i ng t he ge s t u r e s d i r e c t l y a f t e r p r ope r t i e s
i n s pe e c h ) do no t e x p l a i n t he p r ope r t i e s , a t l e a s t no t a l l o f t he m,
b e c a u s e t h e o r d e r i n g p a t t e r n u s e d b y t h e a d u l t s i n t h e g e s t u re
c o n d i t i o n d id n o t c o n f o r m t o a c a n o n i c a l E n g l i s h o r d e r a n d t h u s
c ou l d n o t ha ve be e n r e a d i l y de r i ve d f r om Eng l i s h . Mor e ove r , t he
d e a f c h il d r e n o f h e a r i n g p a r e n t s h a v e n o u s a b le s p o k e n l a n g u a g e
s ou r c e f o r t he i r ge s t u r e s y s t e ms , bu t s t il l d e ve l op the p r ope r t i e s
o f s e g m e n t a ti o n a n d h i e r a rc h i c a l c o m b i n a t i o n i n t h o s e s y s t e m s
( s e e F o o t n o t e 4 ) .
Are Segmentation and Hierarchical CombinationImposed by the Structure of Thought?
On e pos s i b i l it y is t ha t t he p r ope r t i e s o f s e gme n t a t i on a nd h i -
e r a rc h i c a l c o m b i n a t i o n r e f le c t t h e n a t u r e o f h u m a n t h o u g h t . I n
o t h e r w o r d s , w h e n a s k e d t o d e s c r i b e a s c e n e , h u m a n s m i g h t
t h i nk o f the s c e ne i n t e r m s o f d i s c r e t e e n t i ti e s a r r a nge d i n h i e r -
a r c h i c a l c ombi na t i on a nd , a s a r e s u l t , wou l d be f o r c e d t o de -
s c r i be t ha t s c e ne i n t h i s f o r m a nd t h i s f o r m on ly .
We t h i nk t h i s pos s i b i l i t y un l i ke l y s i mp l y be c a us e we know
f r o m t h e g e s t u r es t h a t p e o p l e s p o n t a n e o u s l y p r o d u c e a l o n g w i th
t h e i r s p o k e n n a r r a t i v e s t h a t h u m a n t h o u g h t n e e d n o t b e s e g -
m e n t e d a n d h i e r a r c h ic a l ly a r r a n g e d ( M c N e i l l , 1 9 9 2 ) . A s d e -
s c r i be d e ar li er , t he ge s t u r e s t ha t a du l t s a nd c h i l d r e n s pon t a n e -ous l y p r od uc e a l ong wi t h t he i r s pe e c h e xp r e s s i de a s bu t e xp r e s s
t h e m i n a d i f f e r e n t f o r m f r o m s p e e c h - - a n u n s e g m e n t e d f o r m
i n wh i c h a s i ng le ge s t u r e c a n c on ve y a n e n t i r e , g l oba l p r opos i -
t i on . Fo r e xa mpl e , c ons i de r how a s pe a ke r mi gh t de s c r i be t he
s pa t i a l re l a t i ons h i p o f Sc o t l a n d t o I r e l a nd i n w or ds a nd i n ge s-
t u r e . Th e ve r ba l de s c r i p t i on w i l l c on t a i n a s e r i e s o f wor d s s yn -
t a c t i c a l l y o r ga n i z e d a nd i s l i ke l y t o me n t i on e a c h l a ndma s s i n
i ts own ph r a s e o r c l a us e . I n c o n t r a s t , t he ge s t u r e i s li ke l y t o be
a s ing le , g l oba l d i s p l a y o f t wo s pa c e s i n a c e r t a i n r e l a t i ons h i p ,
c a p t u r i n g i n n o n s e g m e n t e d f o r m t h e i n f o r m a t i o n t h a t i s i n
s p e e c h a n d p o s s i bl y g o i n g b e y o n d s p e e c h i n s h o w i n g t h e r e la t iv e
pos i t i ons i n s pa c e . I nde e d , i t i s be c a us e s pon t a ne ous ge s t u r e
t a k e s o n a v e r y d i ff e r en t f o r m f r o m s p e e c h t h a t M c N e i U ( 1 9 9 2 )
p r o p o s e d i t a s a u n i q u e w i n d o w t h r o u g h w h i c h t h e t h o u g h t s o f
a s pe a ke r c a n be obs e r ve d ( s e e a l s o Go l d i n - M e a dow , A l i ba li , &
C h u r c h , 1 9 9 3 ) .
T h u s , h u m a n s c a n a n d d o t h i n k a b o u t a s c e n e a s a g l o b a l
w h o l e , a s r e f le c t e d in t h e s p o n t a n e o u s g e s tu r e s t h a t a c c o m p a n y
t h e i r s p ee c h . T h e s t r u c t u r e o f t h o u g h t c a n n o t , t h e n , b e s o le l y
r e s p o n si b l e f o r t h e s e g m e n t e d a n d c o m b i n a t o r i a l s t r u c t u r e s e e n
i n t he ge s t u r e s o f t he he a r i ng a d u l t s i n t he ge s t u r e c ond i t i on o r
i n t h e g e s t u r e s o f th e d e a f c h il d r e n i n G o l d i n - M e a d o w ' s s t u d ie s .
The Drive TowardSegmentation: Establishing Reference
T h e t a s k t h a t f a c e d th e a d u l t s i n b o t h c o n d i t io n s o f o u r e x -
p e r i m e n t w a s t o d e s c r ib e a s i m p l e s c e n e t o a n o t h e r p e r s o n . T h e
f i r s t s t e p i n s uc h a t a s k i s t o ma ke i t c l e a r wha t t he s c e ne i s
a bou t ; t ha t i s, t o e s t a b l is h r e f e r e nc e . T h i s s t e p wa s e a s y t o a c -
c ompl i s h i n t he ge s t u r e + s pe e c h c ond i t i on ; pa r t i c i pa n t s u s e d
s pe e c h t o f oc us a t t e n t i on on t he o b j e c t s i n t he s c e ne , e i t he r by
i n t r o d u c i n g t h e o b j e c t s i n s e p a r a te c l a u s e s ( " T h e r e ' s a t o y g ir lw i t h a c i r c le s t a n d i n g n e x t t o h e r ; s h e j u m p s i n t o i t " ) o r b y
r e f e rr i n g t o t h e o b j e c t s w i t h s e p a r a t e n o u n s ( " A t o y g i rl j u m p s
i n t o a c i r c l e " ) . A g e s t u re m i g h t a c c o m p a n y t h e s p e e c h ( e .g . , th e
p a r t i c i p a n t m i g h t j u m p h i s h a n d , l o o s e ly h el d , f r o m o n e p o i n t
t o a n o t h e r a s h e s ay s, " a t o y g i rl j u m p s i n t o a c i r c l e " ) . N o t e t h a t
t h e g e s t ur e c a n c o n v e y m i m e t i c a s p e c t s o f th e s c e n e t h a t a r e n o t
c o n v e y e d i n s p e e c h ( e . g ., h o w h i g h t h e g i rl j u m p e d , h o w s o f t ly
s he l a nde d , e t c .) . The i n f o r m a t i on c onv e ye d by ge s t u r e is i n t e r -
p r e t a b l e t o t he l i s t e ne r p r i ma r i l y be c a us e t he ge s t u r e i s f r a me d
by t he s pe e c h t ha t i t a c c ompa n i e s ; t ha t i s , s pe e c h s upp l i e s a
s o c ia l ly c o n s t it u t e d f o r m o f t h e s a m e o r r e l a te d c o n t e n t t h a t i s
p r ov i de d i n i ma g i s t i c f o r m b y t he ge s tu r e .
I m a g i n e n o w h o w t h e s a m e p a r t i c i p a n t m i g h t e s ta b l is h r e f er -
e n c e i n t h e g e s tu r e c o n d i t i o n . H e c o u l d p r o d u c e t h e s a m e g e s-t u r e t h a t h e p r o d u c e d i n t h e g e s t u r e + s p e e c h c o n d i t i o n - -
j u m p i n g h i s l o os e ly h e ld h a n d f r o m o n e p o i n t t o a n o t h e r - - b u t
s uc h a ge s t u r e , no l onge r f r a me d b y s pe e c h , wou l d no t i nd i c a t e
w h o i s d o i n g t h e j u m p i n g , n o r w o u l d i t in d i c a t e t h e e n d p o i n t
o f th e j u m p . T o m e e t t h e s e r e q u i r e m e n t s , p a r t i c i p a n t s i n t h e
g e s t ur e c o n d i t i o n c o u l d a l te r t h e g e s t u re s t h e y p r o d u c e d i n t h e
g e s t ur e + s p e e c h c o n d i t io n i n o n e ( o r b o t h ) o f tw o w a y s : ( a )
T h e y c o u l d p r o d u c e a s e r ie s o f g e st u r es t o r e f er t o t h e s c e n e
( e .g . , th e y m i g h t f o r m c u r l s o n t h e i r o w n h e a d s t o i n d i c a t e t h e
g ir l, ho l d a C- s ha pe d ha nd t o i nd i c a t e t he c i rc l e , a nd t he n p r o -
d u c e t h e " j u m p " g e s t u r e ). ( b ) T h e y c o u l d a d d e l e m e n t s t o t h e
ge s t u r e i t s e l f t ha t s e r ve t o i de n t i f y t he ob j e c t s ( e .g . , a n i nve r t e d -
V h a n d s h a p e i n d i c a ti n g t h e l eg s o f t h e g ir l m i g h t b e " j u m p e d "
i n t o a C- s ha pe d ha nd i nd i c a t i ng t he c i r c l e ) . I n t e r e s ti ng l y , bo t h
o f the s e s t r a t e g i e s ha ve be e n i de n t i f i e d i n a s t udy s i m i l a r t o ou r
o w n ( D u f o u r , 1 9 9 2 ) i n w h i c h h e a r i n g a d u l t s w e r e a s k e d t o u s e
ge s t u r e r a t he r t h a n s pe e c h t o c onv e y a s t o r y . 6
T h u s , t h e r e q u i r e m e n t t h a t r e f e r e n c e b e e s t a b li s h e d a p p e a r s
6 Du four did not include in his study a condition in w hich the partic-ipant was asked to tell the story in speech with no mention made o fgesture; as a result , the design of his study did n ot permit him to deter-m ine whether participants' gestures differed with and withou t speech.
7/28/2019 Mc Neill, d & Al -Catalogo- 5-2196 (0339) Impresion Pendiente
to lead natura lly to a process of segmenting he scene, breaking
it up so that each elem ent is identified. Note that the process
of establishing reference through symbolic means is inheren tly
social--the goal is not just to reconstruct the scene in one's
own mind b ut to reconstr uct it in the min d of another. Freyd
(1983) suggested that the very act of sharing information
across min ds will force that in forma tion to take a discrete and
segmented form. Freyd argued that even if knowledge is truly
represented in a cont inuou s form, in the process of sharing
that knowledge with another indi vidual, the knowledge must
go through a discrete filter, and, as a result, its representation
ends up looking discrete.
The Drive Toward Combination." Relating Referents to
One Another
Once a scene has been segmented into elements, the elements
need to be bro ught together into a whole in order for the scene
to be adequa tely described. If left uncom bine d, the gestures do
serve to refer to the elem ents in the scene but they do not conv ey
how those elements func tion together within the scene. To do
so, the gestures for the eleme nts need to be brou ght together insuch a way that the rela tionship among them is clear. One strat-
egy for accomplishing this goal is to conj oin the gestures for the
elements in a scene into a single gesture string and to posit ion
each gesture within that string according to the role played by
the el ement the gesture represents. This is, in fact, the strategy
followed by p articip ants in the gesture condi tion, who tended to
produce gestures for the elemen ts in a scene within a single ges-
ture string (i.e., without breaking the flow of movement be-
tween the gestures). Moreover, partic ipant s in this condition
positioned the gestures within the string in a systematic fashion:
The gesture for the stationary object preceded the gesture for
the movi ng object, which, in turn, preceded the gesture for the
action. This par ticul ar order, in fact, follows an intuiti vely nat-
ural progression in terms of laying out the scene for the lis-
ten erm it first sets the scene for the listener (with the stationa ry
object), then introduces the focus or topic of the scene (the
moving object), and finally comments on that topic (the
actio n). Interestingly, this parti cular order is one that is rou-
tinely found in ASL for scenes of this type (T. Supalla, personal
communicati on, January 20, 1994) and is reminiscent of an
order found i n a gesture system developed by a woman who was
the only deaf person in a hearing Amerindi an reservation (Yau,
1985). The order thus appears to be one that is naturally ex-
ploited in manual communication systems- -in conventional
sign languages handed down from generation to generation as
well as in sp ontaneous gesture systems created by individ uals.
In summary, the communicative requirement to make clearhow the elements in a scene relate to one another appears to
lead naturally to the process of systematic combination. In this
regard, it is imp ort ant to recall that, in the gesture + speech
condition, participants did produce gestures for the elements.
Indeed, a look at Figure 1 shows that p artici pants conveyed el-
ements in this c ondition almost as freque ntly as in the gesture
condition (although the i ntent may have been to convey a global
rather than a segmented meaning).7 The crucial difference is
that, in the gesture + speech condition, gestures referring to
elements were each produc ed as a separate uni t (i.e., there was
a break in the flow of movem ent between the gestures), whereas
in the gesture condition the gestures were conjoined within a
single string (with no break in the movement). Thus, the
difference between the two conditi ons was not pr imari ly a
matter of referring to the elements but of referring to them as
elements within a proposition. In the gesture condition, this task
is assumed enti rely by gesture but, in the gesture + speech con-
dition, the task of recombining elements to relate them to one
anothe r is natura lly taken over by speech.
We now gain insight into how silence "liberates" grammati-
cal properties in the manual modality. Segmented and combi-
natorial representation is the form that symbolic huma n com-
munica tion must take. Speech performs these required func-
tions in normal discourse, with gesture forming an integrated
system with that speech and conveying information in a global
and mimeti c form. The need for segmented and combinatorial
representation is not created by speech but rather by the de-
mands of symbolic hum an c ommunicat ion. When speech is re-
moved, the need for segmented and c ombinatorial representa-
tion remains, and the requirement is filled, for both the deaf
children in Goldin-Meadow's studies and the adults in our
study, by gesture. Thus, when gesture alone carries the full bur-den of communication, it no longer has the global and largely
mimetic form that it is constrained to assume when it forms
an integrated system with sp eech- -it must now take over the
7 The fact that participants generated gestures for elements within a
scene almost as often in the gesture + speech condition as in the ges-
ture condition suggests that segmentation may occur in gesture even
when it does not carry the full burden of communication. However,
it is important to point out that segmentation is not independent of
combinat ion. It is only when two gestures are combined within the
bounds of a single string that there is good evidence that these gestures
function as a unit, with each gesture reflecting a piece of the proposi-
ti on -t ha t is, that the gestures truly represent segmented dements
within a proposition. For example, a gesture coded as representing arolling movement could either stand for the semantic element "roll-ing" or for the whole "ball-rolling" proposition. Imagine that a speaker
produces this rolling gesture concatenated with another gesture resem-
bling the shape of the ball. Because the two gestures form a unit and
contrast with one another within that unit, we assume that each ges-
ture represents a piece of the proposition, with the rolling gesture rep-resenting the act ("roll") and the ball gesture representing the moving
object ("bal l") . In contrast, if the rolling gesture is produced on its
own and not concatenated with any others, the gesture could easily beassumed to stand for "ball rolling" as a whole.
Because the gestures in the gesture + speech condition were almost
always produced on their own (i.e., not combined and therefore not
contrasted with other gestures), there was no reason to assume that
these gestures were segmented elements. Rather than semantic pieces of
a scene, the gestures in the gesture + speech condition appear to besnapshots of full propositions taken from different angles--the angle of
the object, the angle of the action, and so forth--presented along withspeech. As snapshots of the whole, the gestures in the gesture + speech
condition did not need to be combined with other gestures to conveythe proposition--each gesture did so on its own. Thus, although in thegesture condition there was reason (specifically, he frequent concatena-
tion of gestures into strings) to assume that each gesture referred to a
particular element and that segmentation had taken place, there was noreason to make this assumption in the gesture + speech condition, and
indeed some reason not to make it i n this condition (the lack of concat-
enation despite gestures apparently referring to parts of the scene).
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essential role and assume the segmented and combinatorial
form required for symbolic human communication. By break-
ing the bond between gesture and speech, silence frees gesture
from the constraints imposed by being part of an integrated
system with speech--only to force gesture into the constraints
imposed by carrying the full burden o f communication, that is,
the constraints of a languagelike system.
Grammatical Properties Beyond Segmentation and
Combination
In ternal Cons is tency: Going Beyond Segm entat ion an d
Com binat ion to Form a L inguis t ic Sys te m
The adults in the gesture condition produced gestures that
had the properties of segmentation and combination in com-
mon with the gestures produced by the deaf children in Goldin-
Meadow's studies. However, the gestures that the adults pro-
duced did not share all of the languagelike properties found in
the deaf children's gesture systems. In particular, the adults ' ges-
tures were not systematically organized into a system o f internal
contrasts, whereas the deaf children's gestures were. Thus, un-like the deaf children, the adults displayed hierarchical but not
necessarily consistent use of constituents in their gestures, Sin-
gleton, Morford, and Goldin-Meadow (1993) gave the VMP
test to one of the deaf children in Goldin-Meadow's sample.
The child described each scene in the test using his own gesture
system, and his gestures were compared with those produced
by the 16 hearing adults in the gesture condition in this study
and with gestures produced by 8 hearing children. Singleton et
al. found that, when incorporating hand shape information into
their action gestures, the hearing adults and children rarely used
the same hand shape to represent an object each time it oc-
curred on the test, whereas the deaf child frequently did. In
other words, there was consistency across hand shapes in this
deaf child's gestures (as well as in the gestures o f each of the 3
other deaf children shown to have morphological structure in
their spontaneous communications; Goldin-Meadow et al.,
1995), but not in the gestures of each hearing adult or child.
Thus, there was evidence for a system of contrasts in the deaf
children's gestures but not in the gestures o f the hearing adults
and children.
Singleton et al. (1993) suggested that the hand shape differ-
ences between the deaf child and the hearing gesturers reflect a
fundamental difference in the way participants generated ges-
tures. When the hearing gesturers generated a gesture, their goal
was to produce a hand shape that adequately represented the
object, and their choice of hand shapes appeared to be con-
strained only by their imaginations and the physical limitationsimposed by the hands themselves. For example, one of the
child-hearing gesturers produced a different hand shape each of
the five times she represented an airplane on the test. Each hand
shape captured an idiosyncratic proper ty (often the differently
shaped wings) of he airplane pictured in that event: (a) thumb,
index, and middle fingers extended; (b) two palms forming a V;
(c) two palms crossed in an X; (d) thumb and pinky extended;
and (e) O-hand used to represent the way the airplane, made of
paper, might have been thrown (the airplane was not actually
thrown in the event). In contrast, when the deaf children gener-
ated a gesture, their choice of hand shapes was guided not only
by how well a hand shape captured the features of an object, but
also by how well that hand shape fit into the set of hand shapes
allowed in their individual gesture systems. The deaf child who
took the VMP test used two different hand shapes on the five
airplane segmentswa flat-palm hand shape and a thumb-and-
pinky-extended hand shape --both of which formed part of this
child's morphological system and could be used to represent
airplanes in that system (Singleton et al., 1993).
Thus, the gestures that the adults produced in the gesture
condition were organized only in relation to their referents; that
is, the form o f the gesture was constrained by the object or ac-
tion it was used to represent. In contrast, the deaf children 's
gestures, in addition to being constrained by form-to-referent
relationships, were also organized in relation to one another;
that is, the form of the gesture was constrained not only by what
it represented but also by how it contrasted with the other ges-
ture forms in the system--form-to-form relationships. The
deaf children's gestures can therefore be said to have the crucial
aspect of linguistic systems that de Saussure (1916/1959)
called linguistic "value"--an aspect that appears to be lacking
in the adults' gestures. According to de Saussure, a language isa system in which all the elements fit together and in which the
value of any one element depends on the simultaneous existence
of all of the others. The fact that linguistic value is a character-
istic of the deaf children's gesture systems but not the adults'
gesture systems suggests that the deaf children--bnt not the
hearing adults--had begun to consider their gestures as a
"problem space" (Karmiloff-Smith, 1979) in their own right.
Condi t ions Fos ter ing a Sy s tem of Contras t s
Why might the deaf children go beyond form-to-referent re-
lations to establish form-to-form relations in their gesture sys-
tems, whereas the adults failed to do so? One possibility is that
the child gesturers were children and therefore more gifted atlanguage creation than the adults (as a critical period hypothe-
sis--cf. Lenneberg, 1967--might predict). Another possibility
is that the deaf children developed their gesture systems over a
period of years, whereas the adults generated their gestures "on
the spot" (see Singleton et al., 1993, for further discussion of
this point ). Indeed, there is evidence that the deaf children first
created gestures with an eye to how well the gesture captured
aspects of the intended referent. Only later in development did
the children provide evidence that they created their gestures,
not only to be good representations, but also to contrast mean-
ingfully with the other gestures in their systems (Goldin-
Meadow & Mylander, 1990b; Goldin-Meadow et al., 1995). a
Thus, it may be necessary first to create a set of gestures that areadequate representations of objects and actions. The next step,
which presumably requires time and experience with the ges-
tures, may be to pull back and consider the set of gestures as a
problem space, isolating the components that recur across the
s It is important to point out that throughout his developmental pe-riod, the deaf children tended to use the same gesture to represent agiven referent; that is, their gestures formed a stable lexicon hroughoutthe period during which these other developmental changeswere occur-ring (see Goldin-Meadow, Butcher, Mylander, & Dodge, 1994).
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G R A M M A T I C A L E X P R ES S IO N I N T H E M A N U A L M O D A L I T Y 5 1
g e s t u r es a n d o r g a n i z i n g t h e s e t a r o u n d t h o s e r e c u r r i n g c o m p o -
n e n t s . I t i s t h i s s e c o n d s t e p t h a t r e s u l t s i n t h e d e S a u s s u r i a n
p r o p e r t y o f l in g u i s t ic v a lu e a n d t h a t t h e a d u l t p a r t i c i p a n t s i n
o u r s t u d y h a d n o t y e t ta k e n .
I s th e r e e v i d e n c e t h a t t h e d e a f c h i l d r e n c o n s i d e r e d t h e i r o w n
g e s t u r e s a s a p r o b l e m s p a c e i n i t s o w n r i g h t ? A l t h o u g h i t i s
d i f fi c u lt t o o b t a i n d i r e c t e v i d e n c e , t h e r e a r e i n d i c a t i o n s t h a t t h e
d e a f c h i l d r e n w e r e c o g n i z a n t o f t h e i r g e s t u re s a s a s y m b o l i c s y s-
t e m . F o r e x a m p l e , o n e o f t h e d e a f c h i l d r e n u s e d g e s t u r e t o r e f e r
t o h i s o w n g es t u re s . T o re q u e s t a D o n a l d D u c k t o y t h a t t h e e x -
p e r i m e n t e r h e l d b e h i n d h e r b a c k , t h e c h i l d p u r s e d h i s l i p s t o
i m i t a t e D o n a l d D u c k ' s b i l l a n d t h e n p o i n t e d a t h i s o w n g e s t u re ,
t h e p u r s e d l i p s ( G o l d i n - M e a d o w , 1 9 9 3 ) . T h u s , t h e c h i l d w a s
a b l e t o u s e t h e p o i n t i n g g e s t u r e m e t a l i n g u i s t i c a l l y , s u g g e s t i n g
t h a t h e c o u l d d i s t a n c e h i m s e l f f r o m h i s o w n g e s t u r e s a n d t r e a t
t h e m a s o b j e c t s t o b e r e f le c t e d on a n d r e f e r r e d t o . A s a s e c o n d
e x a m p l e , t h i s c h i l d w a s o b s e r v e d t o " c o r r e c t " t h e g e s t u r e s h is
h e a r i n g s is t e r p r o d u c e d w h e n s h e t o o k t h e V M P t e s t ( S i n g l e t o n
e t a l. , 1 9 9 3 ) . W h e n t h e s i s t e r u s e d a h a n d s h a p e t h a t , i n t h e
d e a f c h i l d ' s s y s t e m , w a s n o t a n a c c e p t a b l e r e p r e s e n t a t i o n f o r t h e
o b j e c t i n a p a r t i c u l a r v i g n e t t e , th e d e a f c h i l d f ir s t m o c k e d h i s
s i s te r 's h a n d s h a p e c h o i c e a n d t h e n s h o w e d h e r t h e h a n d s h a p et h a t d i d c o n f o r m t o h i s s y s te m . T h e c h i l d t h u s h a d a w e l l -d e v e l -
o p e d a n d a r t i c u l a t e d s e n s e o f w h a t c o u n t s a s a n a c c e p t a b l e ge s -
t u r e i n h i s s y s t em . H e n o t o n l y p r o d u c e d g e s t u r e s t h a t a d h e r e d
t o h i s s t a n d a r d s , b u t h e a l s o i m p o s e d h i s s t a n d a r d s o n t h e g e s-
t u r e s o f a n o t h e r. T h e d i s t a n c e t h a t t h i s d e a f c h il d a c h i e v e d f r o m
h i s g e st u r e s y st e m m a y n o t b e p o s s i b l e i n t h e s h o r t - t e r m c r e -
a t i o n s i t u a t io n t h a t t h e a d u l t s i n o u r s t u d y e x p e r i e n c e d . M o r e -
o v e r, i t m a y b e j u s t t h i s t y p e o f d i s t a n c e t h a t i s e s s e n t ia l f o r a
s p e a k e r t o i n t r o d u c e t h e i m p o r t a n t d e S a u s s u r i a n c h a r a c t e r i s t i c
o f l i n g u is t i c v a l u e i n t o a c o m m u n i c a t i o n s y s t e m .
Gra mm at ical Proper ties and the Co ndi t ions o f Lang uage
CreationI n s u m m a r y , t h e e m e r g e n ce o f s e g m e n t a ti o n a n d c o m b i n a -
t i o n i n t h e e x p e r i m e n t a l p a r a d i g m t h a t w e u s e d i n o u r s t u d y
h i g h l ig h t s t h e r e s i l i e n c e o f t h e s e g r a m m a t i c a l p r o p e r t i e s i n s y m -
b o l i c h u m a n c o m m u n i c a t i o n . 9 W i t h n o t i m e f o r r ef l e c ti o n , t h e
a d u l t s i n o u r s t u d y c o n s t r u c t e d a s e t o f g e s tu r e s c h a r a c t e r i z e d
b y s e g m e n t a t i o n a n d c o m b i n a t i o n . H o w e v er , o u r s i m p l e e x p e r -
i m e n t a l p a r a d i g m w a s n o t s u f f ic i en t t o s u p p o r t t h e e m e r g e n c e
o f o t h e r g r a m m a t i c a l p r o p e r t i e s th o u g h t e q u a l l y c e n t ra l t o h u -
m a n l a n g u a g e - - i n p a r t i c u l a r , a s y s t e m o f c o n t r as t s . T h e s e f i n d -
i n g s s ug g e st t h a t i t m a y b e p o s s i b l e to c l a ss i fy g r a m m a t i c a l
p r o p e r t i e s a c c o r d in g t o t h e t y p e s o f c o n d i t io n s t h a t s u p p o r t
t h e i r c r e a ti o n . B y a l t e r i n g a s p e c ts o f o u r e x p e r i m e n t a l p a r a -
d i g m , w e m a y b e a b l e t o e x p l o r e t h e e f f ec t s o f v a r i o u s c i r c u m -s t a n c es o n t h e e m e r g e n c e o f g r a m m a t i c a l p r o p e r t i e s .
F o r e x a m p l e , u s i n g t h e e x p e r i m e n t a l p a r a d i g m a s i s, w e d is -
c o v e r e d t h a t a s y s t e m o f c o n t r a s t s i n w h i c h t h e f o r m o f a s y m b o l
i s c o n s t r a i n e d b y i t s r e l a t i o n s h i p t o o t h e r s y m b o l s i n t h e s y s t e m
( a s w e l l a s b y i t s r e la t i o n s h i p t o i t s i n t e n d e d r e f e r e n t ) i s n o t a n
i m m e d i a t e c o n s e q ue n c e o f s y m b o l i c a l ly c o m m u n i c a t i n g i n fo r -
m a t i o n t o a n o t h e r h u m a n . T h e d a t a o n t h e d e a f c h i ld r e n s u g g es t
t h a t c o n t i n u e d e x p e r i e n c e w i t h a s e t o f g e s t u r e s m a y b e r e q u i r e d
f o r a s y s t e m o f c o n t r a s t s t o e m e r g e i n t h o s e g e s t u r e s . H o w e v e r ,
i t i s a l s o p o s s i b le t h a t e v e n w i t h c o n t i n u e d e x p e r i e n c e w i t h t h e i r
o w n g e s t u r e s , a d u l t s m a y n o t b e a b l e t o d e v e l o p a s y s t e m o f
c o n t r a s t s w i t h i n t h o s e g e s t u re s . I n o t h e r w o r d s , i t m a y b e t h a t
t h e c r e a t o r m u s t b e a c h i l d i n o r d e r f o r a s y s t e m o f c o n t r a s t s to
e m e rg e . O u r e x p e r i m e n t a l p a r a d i g m c a n b e a d a p t e d t o a d d r e s s
t h i s is s u e. A d u l t s a n d c h i l d r e n m a y b e a s k e d t o r e p e a t t h e p r o -
c e d u r e i n t h e g e s t u r e c o n d i t i o n o v e r a n e x t e n d e d p e r i o d , t h u s
a l l o w i n g e a c h c r e a t o r t h e t i m e t h a t a p p e a r s t o b e n e c e s s a r y ( b u t
m a y n o t b e s u f f i c i e n t ) t o d e v e l o p a s y s t e m o f c o n t r a s t s .
A l t e r n at i v el y , i t m a y b e t h a t w h a t i s c r u c i a l f or a s y s t e m o f
c o n t r a s t s to e v o l v e i n a s y m b o l i c c o m m u n i c a t i o n s y s t e m h a s
m o r e t o d o w i t h t h e r e c i p i e n t t h a n t h e c r e a t or . B e c a u s e th e
a d u l t s i n o u r e x p e r i m e n t r e c e iv e d n o f e e d b a c k f r o m t h e i r r e c i p -
i e n t ( w h o w a s t h e e x p e r i m e n t e r ) a s t o h o w w e l l t h e y c o m m u n i -
c a t e d t h e c h a r a c t e r i s t i c s o f e a c h v i g n e t t e , t h e g r a m m a t i c a l
p r o p e r t i e s th a t a p p e a r e d i n t h e i r g e s t u re s h a d t o r e f l e c t t h e c r e -
a t o r s ' i n t u i ti v e s e n se o f w h a t t h e i r r e c i p i e n t w o u l d f i n d c o m p r e -
h e n s i b l e - n o t w h a t t h e r e c i p ie n t a c tu a l l y u n d e r st o o d . T o e x -
p l o r e t h e r o l e o f t h e r e c i p i e n t , b o t h g e s t u r e r a n d r e c e i v e r m u s t
b e p a r t i c i p a n t s in t h e s tu d y . O u r e x p e r i m e n t a l p a r a d i g m c a n b e
m o d i f i e d t o i n c l u d e a n a i v e r e c ip i e n t , a n d t h e n a t u r e ( e .g . , c h i l d
v s . a d u l t ) o r n u m b e r ( e . g ., o n e v s. m a n y ) o f r e c i p ie n t s c a n b e
s y s t e m a t i c a l l y v a r i e d . F o r e x a m p l e , a n a d u l t a s k e d t o c o m m u -n i c a t e w i t h t h e s a m e r e c i p i e n t m i g h t , o v e r t i m e , g e n e r a t e a s e t
o f a r b i t r a r y s y m b o l s ; t h e s e s y m b o l s m a y o r m a y n o t f o r m a s y s -
t e m o f c o n tr a s t s. I n c o n t r a s t , a n a d u l t a s k e d t o c o m m u n i c a t e
w i t h a v a r i e t y o f r e c ip i e n t s m i g h t , o v e r t h e s a m e p e r i o d , g e n e r -
a t e a r e l a ti v e l y i c o n i c s e t o f g e s tu r e s b u t o n e t h a t b e c o m e s s y s -
t e m a t i z e d i n r e s p o n s e t o t h e v a r i a b i l i t y a m o n g r e c e i v er s .
A l o n g t h e s e li n e s , i t i s i m p o r t a n t t o n o t e t h a t , a l t h o u g h b o t h
t h e d e a f c h i ld r e n i n G o l d i n - M e a d o w ' s s t u d y a n d t h e a d u l t s i n o u r
s t u d y u s e d t h e i r g e s tu r e s to c o m m u n i c a t e w i t h o t h e r s, n e i t h e r o f
t h e s e g e s t u r e s y s t e m s c a n b e c o n s i d e r e d a s h a r e d s y s t e m . B o t h
t h e h e a r i n g a d u l t s a n d t h e d e a f c h i l d re n produced g e s t u r e s t h a t
w e r e r e c e i v e d b y o t h er s , b u t n e i t h e r t h e a d u l t s n o r t h e d e a f c h il -
d r e n received h e i r o w n g e s t u r e s a s i n p u t . T h e h e a r i n g a d u l t s r e -
c e i ve d n o g e s t u ra l i n p u t w h e n t h e y p a r t i c i p a t e d i n t h e e x p e r i-
m e n t . T h e d e a f c h i ld r e n s a w t h e s p o n t a n e o u s g e s t u r e s o f t h e i r
h e a r i n g p a r e n t s ; h o we v er , t h e p a r e n t s ' g e s t u r e s w e r e s t r u c t u r e d
l i ke a ll g es t u re s t h a t a c c o m p a n y s p e e c h h t h e y w e r e g l o b al a n d
m i m e t i c , r a r e l y c o m b i n e d w i t h o n e a n o t h e r a n d s h o w in g n o e v i -
d e n c e o f in t e r n a l c o m p o n e n t s ( G o l d i n - M e a d o w & M y l an d e r,
1 9 84 , 1 9 9 0 b ) . T h u s , t h e g e s t u r e s t h e d e a f c h i l d r e n r e c e i v e d a s
i n p u t w e r e d i s t in c t f r o m t h e g e s t u r es t h e y t h e m s e l v e s p r o d u c e d
a s o u tp u t . " C o m m u n i c a t i o n , " a s w e h av e u s e d t h e t e rm , i m p l i e s
o n l y t h a t t h e g e s t u r e r i n t e n d s h i s m e s s a g e t o b e r e c e i v e d b y a n -
o t h e r. I t i s , h o w e v er , i n t e r e s t i n g t o a s k w h e t h e r a c o m m u n i c a t i o n
s y s t em t h a t i s b o t h p r o d u c e d a n d r e c e i v e d w i l l t a k e o n g r a m m a t -
i c a l p r o p e r t i e s t h a t a r e d i s t i n c t f ro m t h e p r o p e r t i e s f o u n d i n a
s y s t em t h a t i s o n l y p r o d u c e d a n d n o t r e c e i ve d . O u r e x p e r i m e n t a lp a r a d i g m c a n a g a i n b e a d a p t e d t o e x p l o r e th i s i ss u e . Tw o a d u l t s
m a y b e a s k e d t o a l t e rn a t e i n p r o d u c i n g a n d r e c e iv i n g g e s t u ra l
d e s c r i p t i o n s i n t h e g e s t u r e c o n d i t i o n , a c o n d i t i o n t h a t c o u l d w e l l
e v o l v e t o w a r d a s y s t e m t h a t i s t r u l y s h a r e d , a n d o n e t h a t m a y
d i f f e r s u b s t a n t i a l l y f r o m a s y s t e m u s e d o n l y i n p r o d u c t i o n .
9 Casey and Kluend er ( in press) recently argued that segmentat ion
and combina t ion may have been in te rmedia te morphosyn tac t i c fo rms
in the evolut ion of language; i f so, these gramm atical propert ies would
be resi l ient in an evolut ionary as well as a developmental sense.
7/28/2019 Mc Neill, d & Al -Catalogo- 5-2196 (0339) Impresion Pendiente
A s a f i n a l e x a m p l e , i t i s w o r t h n o t i n g t h a t o u r s t u d y i s a
s i n g le g e n e r a t i o n d e e p . P a s s in g a c o n v e n t i o n a l c o m m u n i c a t i o n
s y s t e m d o w n f r o m g e n e r a t i o n t o g e n e r a t i o n t e n d s t o a l t e r t h e
s t r u c t u r e o f t h a t s y s t e m , c r e a t i n g l a n g u a g e c h a n g e o v e r h i s t o r -
i c a l t i m e . T h i s i s s u e c a n b e e x p l o r e d o v e r a s h o r t e r p e r i o d b y
a g a in a d a p t i n g o u r e x p e r i m e n t a l p a r a d i g m a l o ng a d i f f e re n t
d i m e n s i o n . A f t e r tw o a d u l t s h a v e d e v e l o p e d a g e s t u r e s y s t e m ,
t h e y m a y b e a s k e d t o s h a r e t h a t s y s t e m w i t h a t h i r d p e r s o n ( a n
a d u l t o r p e r h a p s a c h i l d ) w h o i s n e w t o t h e t a s k . T h e t h i r d
p e r s o n , e x p e r i e n c i n g t h e s y s t e m f o r t h e f i r st t i m e , m a y i n t r o -
d u c e c h a n g e s i n t o t h e s y s t e m , c h a n g e s t h a t m a y c o m e a b o u t
o n l y w h e n a n o v i c e v ie w s t h e s y s t e m a s a w h o l e ( c f . K e g l , 1 9 9 4;
S i n g l e t o n & N e w p o r t , 1 9 9 2 ) .
T h u s , o u r e x p e r i m e n t a l p a r a d i g m m a y b e a d a p t e d t o p r o b e
l a n g u a g e c re a t i o n o v e r th e s h o r t - t e r m , p r o v i d i n g u s w i t h a t e c h -
n i q u e t o e x p l o r e t h e e f f ec t s o f v a r i o u s e n v i r o n m e n t s o n t h e
s t r u c t u r e o f s y m b o l i c h u m a n c o m m u n i c a t i o n . N o t e , h o w ev e r,
t h a t o u r g e s t u r e - c r e a ti o n p a r a d i g m , a l t h o u g h u s e f u l f o r e x p l o r -
i n g a s p e c ts o f l a n g u ag e c r e a t i o n , d o e s n o t s i m u l a t e t h e c o n d i -
t i o n s t h a t e x i s t e d w h e n l a n g u a g e w a s c r e a t e d f o r t h e f ir s t t i m e .
N e v e r th e l es s , o u r f i n d i n g s p r o v i d e u s w i t h g r o u n d s f o r s p e c u l a -
t i o n a b o u t l a n g u a g e e v o l u t i o n , a n d w e t u r n t o t h i s t o p i c in t h ef ina l sec t ion .
Gesture and Linguistic Evolution
S i g n e d l an g u a g e s ( a s w e l l a s o u r o w n g e s t u r e c o n d i t i o n ) m a k e
i t c l e a r t h a t t h e m a n u a l m o d a l i t y c a n a s s u m e a s e g m e n t e d a n d
c o m b i n a t o r i a l fo r m . W h y t h e n d i d l a n g u a g e b e c o m e t h e p r o v -
i n c e o f t h e o r a l m o d a l i t y ? W h y i s s p e e c h t h e m o s t c o m m o n
f o r m o f l in g u i s ti c b e h a v i o r i n h u m a n c u l t u r e s w h e n i t c o u l d j u s t
a s e a s i ly h a v e b e e n s i g n ? W e s p e c u l a t e t h a t h a v i n g s e g m e n t e d
s t r u c t u r e i n t h e o r a l m o d a l i t y a s w e c u r r e n t l y d o l e a ve s t h e m a n -
u a l m o d a l i t y f r e e t o c o - o c c u r w i t h s p e e c h a n d t o c a p t u r e t h e
m i m e t i c a s p ec t s o f c o m m u n i c a t i o n along with s p e e c h . T h u s ,
o u r c u r r e n t a r r a n g e m e n t a l l o w s u s t o r e t a i n , a l o n g w i t h a s e g -
m e n t e d r e p r e s e n t a t i o n a n d i n a s in g l e s t r e a m o f c o m m u n i c a -
t i o n , t h e i m a g i s t i c a s p e c t s o f th e m i m e t i c t h a t a r e s o v i t a l to
c o m m u n i c a t i o n ( c f. M c N e i l l, 1 9 92 ) .~ ° N o t e t h a t t h e a l t e r n a t iv e
a r r a n g e m e n t - - i n w h i c h t h e m a n u a l m o d a l i tY w o u l d se r v e l a n -
g u a g e li k e fu n c t i o n s a n d t h e o r a l m o d a l i t y w o u l d s e r ve t h e m i -
m e t i c f u n c t i o n s - - h a s t h e d i s a d v a n t a g e o f f o rc i n g t h e o r a l m o -
d a l i t y t o b e u n n a t u r a l l y i m a g i s t i c i n f o r m ( a l t h o u g h s e e H a i -
m a n , 1 98 5 , f o r e v i d e n c e t h a t t h e o r a l m o d a l i t y d o e s e x h i b i t
s o m e i c o n i c p r o p e r t i e s ) . A s a n e x a m p l e , H u t t e n l o c h e r ( 1 9 7 3 ,
1 9 7 6 ) p o i n t e d o u t t h a t a v e r b a l d e s c r i p t i o n o f t h e s h a p e o f t h e
E a s t C o a s t o f t h e U n i t e d S t a t e s i s li k e l y n o t o n l y t o b e v e r y c u m -
b e r s o m e , b u t a l s o t o le a v e o u t i m p o r t a n t i n f o r m a t i o n a b o u t t h e
c o a s t l i n e - - i n f o r m a t i o n t h a t w e s u g g e s t c o u l d e a s i l y b e c a p -t u r e d i n a m i m e t i c g e s t u r e t r a c i n g th e o u t l i n e o f t h e c o a st . B e -
c a u s e g e s tu r e a l lo w s o n e t o r e p r e s e n t a n i m a g e a s a w h o l e
w i t h o u t b r e a k i n g i t i n t o p a r t s , g e s t u r e o f f e rs a b e t t e r v e h i c l e f o r
e n c o d i n g i m a g i s t ic i n f o r m a t i o n t h a n d o e s s p e e c h ( G o l d i n -
M e a d o w e t a l . , 1 9 9 3 ). T h e m a n u a l m o d a l i t y is t h e r e f o r e t h e
n a t u r a l c h o i c e t o e n c o d e m i m e t i c i n f o r m a t i o n , l e a v in g i n f o r-
m a t i o n t h a t i s b e t t e r c a p t u r e d i n a d i s c r e te a n d s e g m e n t e d f o r m
t o t h e o r a l m o d a l i t y . U n d e r t h i s s c e n a r i o , s p e e c h b e c a m e t h e
p r e d o m i n a n t m e d i u m o f h u m a n l a ng u a ge n o t b e c a u s e it i s s o
w e l l s u i t e d t o t h e l i n e a r a n d s e g m e n t e d r e q u i r e m e n t s o f s y m -
b o l ic h u m a n c o m m u n i c a t i o n ( t h e m a n u a l m o d a l i t y is eq u a l ly
s u i t e d t o t h e j o b ) , b u t r a t h e r b e c a u s e i t i s n o t p a r t i c u l a r l y g o o d
a t c a p t u r in g t h e i m a g i s ti c c o m p o n e n t s o f h u m a n c o m m u n i c a -
t i o n ( a t a s k a t w h i c h t h e m a n u a l m o d a l i t y e xc e ls ). 11
I n s u m m a r y , w h e n b o t h t h e m a n u a l a n d o r a l m o d a l i t i e s a r e
a c c e s si b l e, c o m m u n i c a t i o n t y p i c a l l y i n v o l v e s t h e h a n d a s w e l l
a s t h e m o u t h ( t h i s i s s o e v en i n t h e c o n g e n i t a l l y b l i n d , w h o h a v e
n o m o d e l f o r g e s t u ri n g ; Iv e r s o n & G o l d i n - M e a d o w , 1 9 9 5 ) . G e s -
t u r e a n d s p e e c h f o r m a n i n t e g r a t e d s y s t e m , w i t h s p e e c h a s s u m -
i n g a s e g m e n t e d a n d c o m b i n a t o r i a l f o r m a n d g e s t u r e a s s u m i n g
a g l o b a l a n d m i m e t i c f o r m . T h e q u e s t i o n w e a s k e d i n t h i s s t u d y
w a s w h a t h a p p e n s w h e n s p e e c h i s r e m o v e d . W i l l g e s t u re c o n -
t i n u e t o a s s u m e t h e g l o b a l a n d m i m e t i c f o r m t h a t i t ty p i c a l l y
a s s u m e s w h e n p r o d u c e d a l o n g w i t h s p e e c h , o r w i l l i t ta k e o v e r
t h e s e g m e n t e d a n d c o m b i n a t o r i a l f o r m t h a t i s t y p i c a l l y t h e
p r o v i n c e o f s p e e ch ? W e f o u n d t h a t g e s t u re d o e s n o t r e m a i n
g l o b a l a n d m i m e t i c b u t r a t h e r i m m e d i a t e l y s w i tc h e s i t s f o r m .
G e s t u r e a s s u m e s t h e s e g m e n t e d a n d c o m b i n a t o r i a l f o r m o f
s p e e c h , a l th o u g h i t d o e s n o t t a k e o n a l l o f t h e g r a m m a t i c a l p r o p -
e r t i e s f o u n d i n s p e e c h , n o r e v e n a l l o f t h e g r a m m a t i c a l p r o p e r -
t i e s f o u n d i n g e s t u r e s y s t e m s d e v e l o p e d ov e r a p e r i o d o f y e a r s b y
d e a f c h i l d r e n w h o u s e g e s t u r e a s t h e i r s o le m e a n s o f c o m m u n i -c a t i o n ( c f. G o l d i n - M e a d o w & M y l a n d er , 1 9 9 0 a ) .
O u r f i n d i n g s s u g g e s t t h a t a s e g m e n t e d a n d c o m b i n a t o r i a l
f o r m i s e s s en t i al to s y m b o l i c h u m a n c o m m u n i c a t i o n , s o es -
s e n t i a l t h a t , i f p r e v e n t e d f r o m c o m i n g o u t o f th e m o u t h , i t w i l l
c h a r a c t e r iz e w h a t c o m e s o u t o f th e h a n d s . W e s p e c u l a t e t h a t
t h e p r o p e r t i e s o f s eg m e n t a t i o n a n d c o m b i n a t i o n a r i s e i n e v it a -
b ly , n o t f r o m h o w h u m a n s t h i n k , b u t f r o m t h e t a sk o f s y m b o l -
i c a ll y c o m m u n i c a t i n g t h e i r t h o u g h ts t o o t h e r s - - t h e n e e d t o
e s t a b l i s h r e f e re n c e a n d r e l a t e t h o s e r e f e r e n t s t o o n e a n o t h e r . I t
i s n o t t h e c o m m u n i c a t i v e t a s k a l o n e t h a t f o s t e r s t h e s e p r o p e r -
t ie s , b e c a u s e s e g m e n t a t io n a n d c o m b i n a t i o n d o n o t a p p e a r i n
c o m m u n i c a t i o n s y s t e m s u s e d b y o t h e r a n i m a l s . R a t h e r , s e g -
m e n t a t i o n a n d c o m b i n a t i o n a p p e a r t o b e i n e v i ta b l e c o n s e-
1o One might argue that the imagistic aspects o f the m imetic are not
so v i t a l to symbol ic human com munica t ion on the g rounds tha t we do
comm unicate when gesturing is not possible (e .g., on th e telephon e).
However, as far as we know, no one has at tem pted to evaluate whethercom mu nicatio n in such situations is as effective as face-to-face comm u-
nicat ion ( indeed, many speakers f ind themselves gesturing on the tele-
phone, presum ably feel ing a need to augm ent their ta lk in some perhapsmim etic way; cf. Rime, 1982). M oreover, there is much w ork suggesting
that the gestures pro duce d along with speech d o indeed serve an essen-
t ial role in com municat ion (Goldin-Meadow, Wein, & Chang, 1992;
quences of the hum an m ind grappling with the task of shared
symbolic communic ation.
We end by emphasizing that, although the imagistic informa-
tion that gesture is constrained to convey when it accompanies
speech is an impo rtant part of huma n commu nicat ion (cf.,
McNeill, 1992), it can be compr omise d when gesture is called
on to ca rry the full burden of commu nication. When gesture is
the only moda lity available, it is no longer purely driven by im-
agery but instead assumes the segmented and combinatorial
form required for symbolic human communication. Thus,
when the bo nd between gesture and speech is broken, gesture is
liberated--no longer bound by the constraints imposed on it
in the integrated system it shares with speech. However, this
freedom is short-lived as, once li berated, gesture is constraine d
again--f orced to take on the forms imposed by carrying the full
burden of symbolic hum an com munication.
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