Usable Accessibility: Making Web Sites Work Well for People with Disabilities
http://www.uxmatters.com/mt/archives/2009/02/usable-accessibility-making-web-sites-work-well-for-people-with-disabilities.php

Quesenbery, Whitney
UXmatters
2009

Abstract:

When people talk about both usability and accessibility, it is often to point out how they differ. Accessibility often gets pigeon-holed as simply making sure there are no barriers to access for screen readers or other assistive technology, without regard to usability, while usability usually targets everyone who uses a site or product, without considering people who have disabilities. In fact, the concept of usability often seems to exclude people with disabilities, as though just access is all they are entitled to. What about creating a good user experience for people with disabilities—going beyond making a Web site merely accessible to make it truly usable for them?