Cognitive disabilities and accessibility issues
WebAIM provides a great two-part series on Cognitive disabilities and web development: “Cognitive disabilities are the least understood and least discussed type of disability among Web developers. As a result, developers rarely design Web content to be accessible to people with cognitive disabilities.”
Read the articles:
Cognitive Disabilities Part 1: We Still Know Too Little, and We Do Even Less
Cognitive Disabilities Part 2: Conceptualizing Design Considerations