AfA - Liddy Nevile


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  • T ē n ā t ā tou katoa
  • AfA - Liddy Nevile

    1. 1. Access For All Accessibility: an inclusive approach Liddy Nevile La Trobe University
    2. 2. My argument <ul><li>Being inclusive is a fundamental requirement of integrity </li></ul><ul><li>Inclusion requires adaptability for personal and device differences </li></ul><ul><li>Adaptability satisfies short term inclusion and long term preservation problems </li></ul><ul><li>Quality processes and efficiency certification are essential for the production of inclusive resources (and services) that will also satisfy preservation needs. </li></ul>
    3. 3. How do we know what he needs?
    4. 4. How do we know what he can do? Braille Jaws Zoomtext
    5. 5. How do we know what they need?
    6. 6. Do we need to know?
    7. 7. How do we know what they need? they
    8. 8. Can we trust them to know what they need?
    9. 9.
    10. 10. TILE <ul><li>E-learning environment that enables learner-centric transformation of learning content and delivery </li></ul><ul><ul><ul><li>Authoring support for transformable content and Metadata </li></ul></ul></ul><ul><ul><ul><li>Browser </li></ul></ul></ul><ul><ul><ul><li>Learning Object Repository </li></ul></ul></ul><ul><ul><ul><li>Learner Preference System </li></ul></ul></ul>
    11. 19. Accessibility accommodations <ul><li>By lowest common denominator? </li></ul><ul><ul><li>W3C WAI standards </li></ul></ul><ul><li>By presumed audience? </li></ul><ul><ul><li>Guess work by site developer </li></ul></ul><ul><li>By individual user? by context? </li></ul><ul><ul><li>AccessForAll standards </li></ul></ul>
    12. 20. Universal accessibility <ul><li>The World Wide Web Consortium’s Web Accessibility Initiative’s </li></ul><ul><ul><li>Web Content Accessibility Guidelines </li></ul></ul><ul><ul><li>Authoring Tools Accessibility Guidelines </li></ul></ul><ul><ul><li>User Agent Accessibility Guidelines </li></ul></ul><ul><ul><li>Accessibility implications of all W3C recommendations </li></ul></ul>
    13. 21. Disabilities Rights Commission (UK) <ul><li>2003 tests of 1000 UK sites </li></ul><ul><li>808 failed to reach minimum reqs of WCAG </li></ul><ul><li>100 conformant sites had 585 accessibility and usability problems </li></ul><ul><li>45% of problems not violations of WCAG </li></ul>
    14. 22. Disabilities Rights Commission (UK) <ul><li>No guidelines will make all sites accessible for everyone but anyway, not all sites will be accessible </li></ul><ul><li>So </li></ul><ul><li>A new approach has been developed (known as AccessForAll approach) to complement the W3C WAI work </li></ul>
    15. 23. Accessibility metadata <ul><li>Even if resources are accessibility standards conformant, those that suit an individual user are: </li></ul><ul><ul><li>not necessarily accessible to her </li></ul></ul><ul><ul><li>not discoverable if they are accessible </li></ul></ul><ul><li>Resources that are not ‘universally’ accessible </li></ul><ul><ul><li>might satisfy her needs and/or preferences </li></ul></ul><ul><ul><li>might have been made accessible retrospectively </li></ul></ul><ul><ul><li>might be made accessible just-in-time </li></ul></ul>
    16. 24. AccessForAll metadata <ul><li>3 main components: </li></ul><ul><li>Metadata to describe needs and preferences of user </li></ul><ul><li>Metadata to describe accessibility characteristics of resources </li></ul><ul><li>Accessibility service to match resources to needs and preferences </li></ul>
    17. 25. Personal Needs and Preferences (PNPs) <ul><li>Display: </li></ul><ul><ul><li>how resources are to be presented and structured, </li></ul></ul><ul><li>Control: </li></ul><ul><ul><li>how resources are to be controlled and operated, and </li></ul></ul><ul><li>Content: </li></ul><ul><ul><li>what supplementary or alternative resources are to be supplied. </li></ul></ul>
    18. 26. Display preferences <ul><li>Where the person can’t see text, it may need to be transformed into another mode - auditory or tactile (Braille). </li></ul><ul><li>Text may need to be bigger and a different colour. </li></ul><ul><li>Images may need to be bigger. </li></ul>
    19. 27. Control preferences <ul><li>Some assistive technologies effectively replace the typical mouse and keyboard combination without any adjustment </li></ul><ul><li>but others use technologies that require special configuration. </li></ul><ul><li>An on-screen keyboard will use screen space e.g. </li></ul>
    20. 28. Content preferences <ul><li>A dyslexic person may need additional images to avoid excessive text density </li></ul><ul><li>a ‘foreigner’ may need an alternative language </li></ul><ul><li>a eyes-busy person may need a text description of an image. </li></ul>
    21. 29. Simple PNP descriptions
    22. 30. Digital Resource Description (DRDs) <ul><li>Display: </li></ul><ul><ul><li>how the resource can be presented and structured, </li></ul></ul><ul><li>Control: </li></ul><ul><ul><li>how the resource can be controlled and operated, and </li></ul></ul><ul><li>Content: </li></ul><ul><ul><li>what supplementary or alternative resources are supplied with the resource. </li></ul></ul>
    23. 31. Basic DRD metadata includes: <ul><li>Access Mode: vision, hearing, touch, text </li></ul><ul><li>Access Mode Usage: informative or ornamental </li></ul><ul><li>Display: amenability of a resource to transformation of the display </li></ul><ul><li>Control: how the method of control is flexible </li></ul><ul><li>Alternatives: any known alternatives </li></ul>
    24. 32. and, where appropriate, <ul><li>Components: any parts that make up this resource (a sound file, an image, etc.) or a composite resource of which it is a part </li></ul><ul><li>Hazards: any dangerous characteristics </li></ul><ul><li>Support tools: electronic tools associated with the resource (calculator, dictionary, etc.) </li></ul>
    25. 33. & DRD for alternatives also includes: <ul><li>Identity of the original resource </li></ul><ul><li>Type: kind of alternative </li></ul><ul><li>Extent: extent of coverage of original resource </li></ul><ul><li>Detailed description of the alternative: description of its characteristics necessary for matching it to details of the PNP. </li></ul>
    26. 34. The Matching Process <ul><li>in a closed environment </li></ul>
    27. 35. The Matching Process <ul><li>in a distributed world </li></ul>
    28. 36. Proving the concept <ul><li>ABC video on demand </li></ul>
    29. 37. AfA is an approach … PNP DRD  Dlfkng fg jhgj fglhk fgh Rt hrtj hlkjg hklj thkkj tt Rt grlkthklj thk thl kjrthk Rthnk tlhkk jthk rth th lrt Framework PNP DRD