Early Sensitivity to Fearful Faces in 3.5 Months Infants /aurie kayet ’f: f Rg 'aldara ? f 5douard Hentaz ’f:fx - Olivier Pascalis ’f: ’g Univg Hrenoble Tlpesf /PN'f "h?Mééé Hrenoblef "rance :g 'NRSf /PN'f "h?Mééé Hrenoblef "rance ?g <epartment of Psychologyf University of "ribourgf "ribourgf Switzerland xg "aculté de psychologie et des sciences de l’éducationf Univg of Henevaf Henevaf Switzerland [email protected] 'ontact= Conclusions ■ Psychometric approach to emotion perception in infants ■ Enhanced detection of fearful faces and eyes in infancy ■ Mostly stable developmental trajectory ■ 5vidence for an early pulvinarhamygdala route[ ■ Neuronal correlates[ Detection advantage of faces with fearful eyes ■ /ogistic mixedhmodel of detection in noisy trials 0?é to MéF signal strengthS ■ 'ontrolling for trialhtohtrial variations in face and eyes signal strength PsychometricScurveSmodeling LookingSpreferenceSforStheSfaceSside ■ ±ain effect of 5motion 0χ²0’S 9 %g)²f p 9 égéé²S ■ No interaction with Tge CustomSfaceSdetectionSparameters:SInfantSd' ■ Wnteractive effect of 5motion and "eature visibility 0χ²0’S 9 %gx²f p 9 égé’’S ■ No interaction with Tge Measuring face versus noise detection in infancy ■ 'apitalizes on the strong preference for faces in infancy [’] ■ Trialhlevel preference for the face side correlates with preference at early detection peak 0Pearson8s r 9 ég)²f p 7 égéé’S LookingSpreferenceSforStheSfaceSside CustomSfaceSdetectionSparameters ■ 'ompare each look8s duration with distribution of looks to face and noise ■ Henerates hitsf missesf ggg ■ Wf median"ace 7 medianNoise group median treshold is used /ook duration 0msf loghscaledS ±ean F looks é ( ’é ’( :é :( AjitA A±issA A"alse TlarmA A'orrect RejectA ?? ’xM %%( :²M’ ’??%é to pure noise to face in noise Introduction Background ■ Tttentional and perceptual salience of fear faces in adults ■ Tttentional sensitivity to fear emerges at % months of age ■ Pulvinar route predicts attraction to fear faces from birth ■ When does the perceptual sensitivity emerge[ Objectives ■ Wncreased detection of fear faces in infants[ ■ <evelopmental shift for fear at % months[ References= [’] Helskov - qouider :é’é [:] /undqvist et alg ’²²M [?] Willenbockel et alg :é’é [x] <akin et alg :éé: [(] Rodger et alg :é’( Methods ■ Sixtyhfour ?g( month old infants 0?’ girlsSf mean age ’’) days ■ Sixtyhfour % month old infants 0?’ girlsSf mean age ’²’ days ■ Sixtyhfour ’: month old infants 0?: girlsSf mean age ?)% days ■ Smiling - fearful faces from % males and % females [:]f gray scaledf aligned - cropped ■ /uminancef global contrast - spatial frequencies equated [?] ■ Weighted mean-phase noise preserves contrast D frequencies [4,5] Participants Stimuli "our conditions= h ±alew"emale h "earwSmile ’é s MéF signal random ordering of facesf signal levelf face side ’é s (éF signal ’é s ?éF signal ’é s xéF signal ’é s ’ééF signal ’é s %éF signal face in noise pure noise Signal strength 0FS ?é xé (é %é Mé ’éé ?é xé (é %é Mé ’éé ?é xé (é %é Mé ’éé ±ean ± sgegm hég: é ég: égx ég% égM ’ ’g: ’gx Infant d' Infant c-bias MM² ms Face Noise Infant d' Infant c-bias M(( ms Face Noise Infant d' Infant c-bias M:é ms Face Noise Custom face detection parameters ±ean ± sgegm 0FS ?g(hmonthholds :é ?é xé (é %é )é Mé ²é To face in noise To matched pure noise %hmonthholds To face in noise To matched pure noise ’:hmonthholds To face in noise To matched pure noise Looking preference for the face side Signal strength 0FS ?é xé (é %é Mé ’éé ?é xé (é %é Mé ’éé ?é xé (é %é Mé ’éé Psychometric function Tll ages collapsed Developmental trajectory Signal strengths ?éhMéF Smile "ear ±outh 5yes "acial emotion ±ost visible feature Signal strength 0FS ±ean infant d8 ± sgegm ?é xé (é %é Mé é ég: égx ég% égM ’ Tge group 0monthsS ?g( % ’: ±ost visible feature 5yes ±outh Tll Signal strength 0FS ±ean face bias ± sgegm 0FS ?é xé (é %é Mé xé x( (é (( %é %( )é )( Mé Tge group 0monthsS ?g( % ’: ±ost visible feature 5yes ±outh Tll 0S g 0S g 0S g