13 Towards Mobile Web Accessibility Evaluation

Rogério Bandeira FFCUL Portugal

Improve
Accessibility & Mobile Adequacy
Support
developers, designers, experts
Integrate
existing knowledge,
standards, guidelines, rules

Accessibility
… Web sites are accessible when individuals with disabilities can access and use them as effectively as people who don’t have disabilities (Slatin and Rush)
Standards, Laws, Tools
Mobile additional restrictions
Screen size , CPU, Battery , Memory, Mouse, Keypad, Communications,
Usage situations

Standards are the best approach to interoperability in this fragmented devices market
MWBP W3C Recommendation 2008
BP to improve user experience of Web when accessed from such devices
60 Best Practices – delivered content
WCAG derived - mobile relevance scope

Disability Types link
body structure impairments (BSI)
deviation, loss, of body functions (sight, hear, …)
map
interaction limitations ( vision loss creates a blind spot, blur)
associate
guidelines and heuristics to specific BSI
determine
users groups that benefit from each guideline application
extend
to cope with WCAG & MWBP

http://www.w3.org/WAI/mobile/experiences Content Disabilities context Mobile context Information conveyed solely with color Visually impaired, Colorblind Limited color palette Outdoors usage Missing or inappropriate page title (e.g. long) Blind, screen reader. list of open windows Small screen or viewport Audio-only prompts (beeps) Deaf or hard of hearing Noisy usage situations Content spawning new windows without warning user Low vision, Restricted field of vision , Blindness, Cognitive disabilities don’t realize new window Single window interface. Multiple stacked windows on small screen hide each other

http://www.w3.org/WAI/mobile/experiences Content WCAG 1.0 checkpoint WCAG 2.0 success criteria MW Best Practice Information conveyed solely with color 2.1, 2.2 1.4.1 Use of Color 1.4.3 Contrast (Minimum) … USE_OF_COLOR COLOR_CONTRAST Missing or inappropriate page title 13.2 2.4.2 Page Titled Page Title Audio-only prompts (beeps) 1.1, 1.4 1.2.1 Audio-only and video-only NON TEXT ALTERNATIVES Content spawning new windows without warning user 10.1 3.1.2 On-focus 3.2.2 On-Input 3.2.5 Chage on Request POP_UPS

Best Practices (Mobile usage context)
Disability Type Related
General Mobile Usage
Disability type inadequate
MWBP

Disability type Usage Scenario Selector Simulation Profile Guidelines User Interface Evaluator HTML Parser Web Resource Included Resource Linked Resource Guideline Tests Results Handler HTTP Handler Pre-Processor Assessor

Extend BP coverage
Integrate Portal, Inference Engine, EARL reports, Feedback
Web designers & developers
accessibility & mobile adequacy specificities
diverse best practices & tools
Common methods & tools
Develop, use, learn and improve
Towards Accessible & Mobile Adequate Web Contents

Thank you !
[email_address]
http://www.accessible-project.eu
feedback wanted from accessibility experts

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13 Towards Mobile Web Accessibility Evaluation

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