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Published byNoreen Hutchinson Modified over 8 years ago
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Accessible but not usable?: a look beyond design guidelines Jane Berliss-Vincent, A.M.L.S. Usability/Accessibility Manager Center for Accessible Technology Berkeley, CA
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Definitions
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Defining disability Legal Functional Cultural Environmental Situational
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Defining accessibility Section 508: technology is accessible if it can be used as effectively by people with disabilities as by those without. WCAG 2.0: perceivable, operable, understandable, robust
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Defining usability Nielsen’s five attributes: learnability, efficiency, memorability, errors, satisfaction
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Conflicts
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Misperceptions Example: Blind people can’t use a keyboard
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Meeting accessibility letter but not spirit Example: ALT attributes Reliability/usefulness of automated checkers
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Product changes Example: MS Office 2007 — “mystic” changes Can affect compatibility with assistive technology
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Dueling functions Example: Simultaneous audio outputs
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Dueling disabilities Example: Color contrast False dueling Example: use of graphics
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Design factor balance Example: Copier Example: HTML and browser compatibility
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Satisfaction Will users WANT to use accessible product? Differences among user experiences: disability, technology, even personality
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Strategies
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Understanding Understanding how people with disabilities—all definitions—use technology Understanding access barriers Understanding how assistive technology addresses some of these barriers
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Flexibility Flexibility within product Flexibility via product environment Flexibility via product competition
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Awareness and evolution of guidelines Sample guidelines WCAG / Section 508 § 1194.22 Section 255 Other WAI guidelines Other parts of Section 508 International variations Guideline revision
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Testing Direct testing Oblique testing
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Bibliography Available at www.janevincent.com/wud/wud2008bib.ht ml www.janevincent.com/wud/wud2008bib.ht ml
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