WCAG 2.0 Testability for Beginners - W4A - Martinez
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WCAG 2.0 Testability for Beginners - W4A - Martinez

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Web accessibility for people with disabilities is a highly visible ...

Web accessibility for people with disabilities is a highly visible
area of research in the field of ICT accessibility, including many
policy activities across many countries. The commonly accepted
guidelines for web accessibility (WCAG 1.0) were published in
1999 and have been extensively used by designers, evaluators and
legislators. W3C-WAI published a new version of these guidelines
(WCAG 2.0) in December 2008. One of the main goals of WCAG
2.0 was testability, that is, WCAG 2.0 should be either machine
testable or reliably human testable. In this paper we present an
educational experiment performed during an intensive web
accessibility course. The goal of the experiment was to assess the
testability of the 25 level-A success criteria of WCAG 2.0 by
beginners. To do this, the students had to manually evaluate the
accessibility of the same web page. The result was that only eight
success criteria could be considered to be reliably human testable
when evaluators were beginners. We also compare our experiment
with a similar study published recently. Our work is not a
conclusive experiment, but it does suggest some parts of WCAG
2.0 to which special attention should be paid when training
accessibility evaluators

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WCAG 2.0 Testability for Beginners - W4A - Martinez WCAG 2.0 Testability for Beginners - W4A - Martinez Presentation Transcript

  • On the testability of WCAG 2.0 for beginners
    Fernando Alonso, José Luis Fuertes, Ángel Lucas González, Loïc Martínez
    DLSIIS. Facultad de Informática. Universidad Politécnica de Madrid. Spain
    W4A
    2010
    7th International Cross-Disciplinary
    Conference on Web Accessibility
  • Contents
    On the testability of WCAG 2.0 for beginners
  • Introduction
    On the testability of WCAG 2.0 for beginners
    Access to ICT is key in
    providing access to
    our society
    Goals
    Technology-independent & testable
    Special attention to Web accessibility
    Experiment on WCAG 2.0 testability for beginners (students in an intensive course)
    WCAG 1.0 (1999)
    WCAG 2.0 (2008)
  • On the testability of WCAG 2.0 for beginners
    WCAG 2.0
  • Testability in WCAG 2.0
    On the testability of WCAG 2.0 for beginners
  • Factors related to testability
    On the testability of WCAG 2.0 for beginners
  • Thecontextfortheexperiment
    On the testability of WCAG 2.0 for beginners
  • The web page
    On the testability of WCAG 2.0 for beginners
  • Theexperiment
    On the testability of WCAG 2.0 for beginners
  • Results
    On the testability of WCAG 2.0 for beginners
    The majority of students gave an incorrect response in 9 success criteria!
  • Results: reliability
    On the testability of WCAG 2.0 for beginners
    13 success criteria are not reliably evaluated with a 64% threshold!
  • Results: insufficientmajority (<64%)
    On the testability of WCAG 2.0 for beginners
  • Results: wrongmajority
    On the testability of WCAG 2.0 for beginners
  • Results: wrongmajority
    On the testability of WCAG 2.0 for beginners
  • Results: reasonsforlack of reliability
    On the testability of WCAG 2.0 for beginners
  • Discussion: Brajnik’s experiment
    On the testability of WCAG 2.0 for beginners
  • Discussion: percentage of agreement
    On the testability of WCAG 2.0 for beginners
    5 success criteria particularly weak in both experiments!
  • Conclusions
    On the testability of WCAG 2.0 for beginners
  • Recommendations
    On the testability of WCAG 2.0 for beginners
  • Future work: more experiments
    On the testability of WCAG 2.0 for beginners
  • Loïc Martínez-Normand (loic@fi.upm.es)
    W4A
    2010
    7th International Cross-Disciplinary
    Conference on Web Accessibility
    Thankyouforlistening!