J. Nielsen, Beyond ALT Text: Making the Web Easy to Use for Users With Disabilities
75 Best Practices for Design of Websites and Intranets, Based on Usability Studies with People Who Use Assistive Technology.
The report contains:
- Results of usability tests of 19 websites with users with several different types of disabilities who are using a range of assistive technology:
- blind users using screen readers
- blind users using Braille readers
- low-vision users using screen magnifiers
- motor-impaired users
- Test data collected mainly in the United States, with some additional studies in Japan to ensure the international applicability of the recommendations
- A total of 104 users participated in the usability studies:
- 84 users with disabilities
- 20 non-disabled users who served as a control group
- 75 detailed design guidelines
Download here: http://www.nngroup.com/reports/accessibility/