Research convergence to enable accessibility to be customised for individual users Liddy Nevile La Trobe University Australia
Dec 09, 2014
Research convergence to
enable accessibility to be
customised for individual users
Liddy NevileLa Trobe
UniversityAustralia
ASK-IT - Nice - 2006 [email protected]
Ideas …
• Concepts behind AccessForAll– personal choice of adaptation
– accessibility for everyone
– discovery of what “I” need
– interoperability
• Approaches to accessibility – universal design and/or
– distributed and cumulative metadata
ASK-IT - Nice - 2006 [email protected]
AccessForAll Accessibility
• What do we want to achieve?
• Flexibility with respect to resources and services so everyone can use them as they choose.
• Let’s see what TILE does:http://inclusivelearning.ca/tile/
ASK-IT - Nice - 2006 [email protected]
TILE
E-learning environment that enables learner-centric
transformation of learning content and delivery
• Authoring support for transformable content and
Metadata
• Browser
• Learning Object Repository
• Learner Preference System
ASK-IT - Nice - 2006 [email protected]
ASK-IT - Nice - 2006 [email protected]
ASK-IT - Nice - 2006 [email protected]
ASK-IT - Nice - 2006 [email protected]
ASK-IT - Nice - 2006 [email protected]
ASK-IT - Nice - 2006 [email protected]
So what’s happening?
ASK-IT - Nice - 2006 [email protected]
DRD metadata
ASK-IT - Nice - 2006 [email protected]
In fact, ……
ASK-IT - Nice - 2006 [email protected]
TILE is …
• A centralised system• All resources are digital• All resources standards compliant• All resources are ‘atomic’ • All resources are appropriately
described
ASK-IT - Nice - 2006 [email protected]
Digital resources (Microsoft research)
ASK-IT - Nice - 2006 [email protected]
Digital resources (Microsoft research)
ASK-IT - Nice - 2006 [email protected]
AfA definition of accessibility
• the accessible relationship between the user and the resource enables the user to make sensory and cognitive contact with the content of the resource.
See http://www.imsglobal.org/accessibility/
ASK-IT - Nice - 2006 [email protected]
Sensory needs and preferences
• I can’t see now• I like Braille but screen-reading is OK• I can’t see well now• I may have an epileptic seizure if I
see flashing• I read (Braille) slowly and may need
extra timeNote - no mention of disabilities!
ASK-IT - Nice - 2006 [email protected]
Relationship Descriptions
• So how do we describe sensory and other accessibility needs and preferences for digital resources?
• We have opted for display, control and content as the three relationships that can be affected and can change.
ASK-IT - Nice - 2006 [email protected]
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture. QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Adapting to all devices & contexts
ASK-IT - Nice - 2006 [email protected]
Adaptive technologies
• Some replace standard technologies and some have special requirements.
• Many have features users like to use.• In addition, there may be requirements
for other display characteristics, and there may be separate needs for content adjustment.
ASK-IT - Nice - 2006 [email protected]
Adaptive technologies
• Some requirements can conflict, eg an on-screen keyboard and a ‘full-screen’ resource.
• For this reason, descriptions of needs and preferences for display, control and content characteristics need to be separated.
ASK-IT - Nice - 2006 [email protected]
Needs and preferences
• Some people can choose between several alternative resources
• Some people can use only one
ASK-IT - Nice - 2006 [email protected]
Multiple PNPs
• Descriptions of users needs and preferences (PNPs) will be used according to the context or circumstances and may differ according to the occasion.
• PNPs may be personal, situational, contextual, etc.
• PNPs should be stored and available any time, anywhere.
ASK-IT - Nice - 2006 [email protected]
• Accessible resource components – in general this means WCAG
compliance– BUT …..
• resources may be distributed• resources may be produced ‘just in
time’
Dependencies
ASK-IT - Nice - 2006 [email protected]
What else is happening?
• IMS and Dublin Core and IEEE/LOM and CEN ISSS/LT and INCITS/V2 and W3C and ISO JTC1 SC …. and
ASK-IT - Nice - 2006 [email protected]
Metadata is …
• Structured, machine-readable information about resources – (data about data)
• Used when Google can’t help…• Human-input is valued• but interoperability is not implied….• And now it might be tagging as
well….
ASK-IT - Nice - 2006 [email protected]
Personal Needs and Preferences (PNPs)
• Display: – how resources are to be presented
and structured, • Control:
– how resources are to be controlled and operated, and
• Content: – what supplementary or alternative
resources are to be supplied.
ASK-IT - Nice - 2006 [email protected]
Display preferences
• Where the person can’t see text, it may need to be transformed into another mode - auditory or tactile (Braille).
• Text may need to be bigger and a different colour.
• Images may need to be bigger.
ASK-IT - Nice - 2006 [email protected]
Control preferences
• Some assistive technologies effectively replace the typical mouse and keyboard combination without any adjustment
• but others use technologies that require special configuration.
• An on-screen keyboard will use screen space e.g.
ASK-IT - Nice - 2006 [email protected]
Content preferences
• A dyslexic person may need additional images to avoid excessive text density
• a ‘foreigner’ may need an alternative language
• a eyes-busy person may need a text description of an image.
ASK-IT - Nice - 2006 [email protected]
Digital Resource Description (DRDs)
• Display: – how the resource can be presented and
structured,
• Control: – how the resource can be controlled and
operated, and
• Content: – what supplementary or alternative resources
are supplied with the resource.
ASK-IT - Nice - 2006 [email protected]
Basic DRD metadata includes:
– Access Mode: vision, hearing, touch, text
– Access Mode Usage: informative or
ornamental
– Display: amenability of a resource to
transformation of the display
– Control: how the method of control is flexible
– Alternatives: any known alternatives
ASK-IT - Nice - 2006 [email protected]
and, where appropriate,
• Components: any parts that make up this resource (a sound file, an image, etc.) or a
composite resource of which it is a part
• Hazards: any dangerous characteristics
• Support tools: electronic tools associated with the resource (calculator, dictionary, etc.)
ASK-IT - Nice - 2006 [email protected]
& DRD for alternatives also includes:
• Identity of the original resource
• Type: kind of alternative
• Extent: extent of coverage of original resource
• Detailed description of the alternative: description of its characteristics necessary for matching it to details of the PNP.
ASK-IT - Nice - 2006 [email protected]
AfA is an approach …
PNP
DRD
Dlfkng fg jhgj fglhk fghRt hrtj hlkjg hklj thkkj ttRt grlkthklj thk thl kjrthkRthnk tlhkk jthk rth th lrt
Fra
mew
ork
PN
PD
RD
ASK-IT - Nice - 2006 [email protected]
Resource metadata
With abstract models …
ASK-IT - Nice - 2006 [email protected]
The conversations flow …
ASK-IT - Nice - 2006 [email protected]
Multi-lingual/multi-cultural
• Definition of languages and cultures
• etc….
ASK-IT - Nice - 2006 [email protected]
Accessibility of events and places, ….
• Location-based– Location dependent– Location independent
• What divisions?– Physical needs?– Electronic needs?
ASK-IT - Nice - 2006 [email protected]
Thank you!
• To participate, please contact me…
– [email protected]– [email protected]
• Check the new standards and work at– http://dublincore.org/groups/access