Barriers to use: usability and content accessibility on the Web's most popular sites
CUU '00 Proceedings on the 2000 conference on Universal Usability
W4A '07 Proceedings of the 2007 international cross-disciplinary conference on Web accessibility (W4A)
Accessibility of emerging rich web technologies: web 2.0 and the semantic web
W4A '07 Proceedings of the 2007 international cross-disciplinary conference on Web accessibility (W4A)
Quantitative metrics for measuring web accessibility
W4A '07 Proceedings of the 2007 international cross-disciplinary conference on Web accessibility (W4A)
An evaluation of web accessibility metrics based on their attributes
Proceedings of the 26th annual ACM international conference on Design of communication
Hera-FFX: a Firefox add-on for semi-automatic web accessibility evaluation
Proceedings of the 2009 International Cross-Disciplinary Conference on Web Accessibililty (W4A)
Invariant-based automatic testing of AJAX user interfaces
ICSE '09 Proceedings of the 31st International Conference on Software Engineering
Redefining assumptions: accessibility and its stakeholders
ICCHP'10 Proceedings of the 12th international conference on Computers helping people with special needs: Part I
Macroscopic characterisations of Web accessibility
The New Review of Hypermedia and Multimedia - Web Accessibility
Developing Hera-FFX for WCAG 2.0
Proceedings of the International Cross-Disciplinary Conference on Web Accessibility
Evaluating the accessibility of rich internet applications
Proceedings of the International Cross-Disciplinary Conference on Web Accessibility
Using acceptance tests to validate accessibility requirements in RIA
Proceedings of the International Cross-Disciplinary Conference on Web Accessibility
Getting one voice: tuning up experts' assessment in measuring accessibility
Proceedings of the International Cross-Disciplinary Conference on Web Accessibility
A macroscopic web accessibility evaluation at different processing phases
Proceedings of the International Cross-Disciplinary Conference on Web Accessibility
A challenge to web accessibility metrics and guidelines: putting people and processes first
Proceedings of the International Cross-Disciplinary Conference on Web Accessibility
The design of RIA accessibility evaluation tool
Advances in Engineering Software
Evaluating Web accessibility at different processing phases
The New Review of Hypermedia and Multimedia - Web Accessibility
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With the increasing popularity of Rich Internet Applications (RIAs), several challenges arise in the area of web accessibility evaluation. A particular set of challenges emerges from RIAs dynamic nature: original static Web specifications can change dramatically before being presented to the end user; a user triggered event may provide complete new content within the same RIA. Whatever the evaluation alternative, the challenges must be met. We focus on automatic evaluation using the current WGAG standards. That enables us to do extensive evaluations in order to grasp the accessibility state of the web eventually pointing new direction for improvement. In this paper, we present a comparative study to understand the difference of the accessibility properties of the Web regarding three different evaluation perspectives: 1) before browser processing; 2) after browser processing (dynamic loading); 3) and, also after browser processing, considering the triggering of user interaction events. The results clearly show that for a RIA the number of accessibility outcomes varies considerably between those tree perspectives. First of all, this variation shows an increase of the number of assessed elements as well as passes, warnings and errors from perspective 1 to 2, due to dynamically loaded code, and from 2 to 3, due to the new pages reached by the interaction events. This shows that evaluating RIAs without considering its dynamic components provides an erroneous perception of its accessibility. Secondly, the relative growth of the number of fails is bigger than the growth of passes. This signifies that considering pages reached by interaction reveals lower quality for RIAs. Finally, a tendency is shown for the RIAs with higher number of states also exposing differences in accessibility quality.