Plain language WCAG 2.0 checklist from WebAIM. If you don't want to slog through all the technical language of WCAG 2.0, this is much easier to understand.
Results of a survey of screen reader users. Screen reader users are not uniform in their responses; proficiency levels and preferences vary widely. Clear heading structure is recommended, as this was a very common navigation technique. Because of the diversity of responses, it may be best to provide options so people can access content in the way that works for them.
Web Accessibility for Cognitive and Learning Disabilities: A Review of Research-Based Evidence in the Literature
Literature review on research related to accessibility specifically for cognitive disabilities. One conclusion from this review is that there's very little research actually out there to draw from; most guidelines and recommendations aren't grounded in much evidence.
Enter a URL, see what the webpage looks like for multiple kinds of colorblindness. Easy to switch from one filter to another to see different variations.
Check website accessibility with a free tool from WebAIM. You can enter a URL, upload a file, or paste HTML code. There's also a Firefox toolbar that lets you check content that is password protected etc.
The WCAG 2.0 guidelines for contrasting colors mean that if color is the only indicator of difference, you need to have sufficient contrast. It's really hard to meet the requirements with color alone, but if you underline your links it's OK.
Because of the WCAG 2.0 contrast requirements, if you don’t underline your links, there’s not much flexibility if you want to be Level AA, let alone Level AAA conformant.
Accessibility: How Many Disabled Web Users Are There? | Practical eCommerce
Some US stats on disabilities that affect web accessibility. Links to UN, UK, and Australian stats are also included.
The most commonly discussed disabilities affecting website accessibility are sight and hearing impairments. These specific impairments encompass 6.8 percent of the population age 15 years and older – and climb to encompass 21.3 percent of the population when you look specifically at the population over 65, according to the 2005 report. Eight-point-two percent of this same population is listed as having difficulty grasping objects– which affects the use of a mouse.
Although this article doesn't give an answer to how much accessibility costs, it does list areas to consider when determining costs. It also provides tips on implementing accessibility effectively through iterative, agile design, focusing on high impact tasks first, rather than trying to do everything at once.
<p>Typically, you will find added costs in the following areas when it comes to integrating accessibility:</p>
<ul>
<li>Determining accessibility requirements for final deliverables</li>
<li>Developing internal style guides and best practices</li>
<li>Training staff</li>
<li>Finding new toolsets</li>
<li>Modifying existing codebases</li>
<li>Additional QA time & resources</li>
<li>Consultant Fees/ Salary for an internal Subject Matter Expert</li></ul>