Web Accessibility Techniques
Why is Web Accessibility Important?
- More than 50 million Americans and 750 million worldwide - have disabilities.
- Numbers increasing as population ages. According to 2003 Census Bureau data, of the 76 million U.S. baby boomers, one out of four over the age of 50 and one out of two over the age of 65 have a disability.
- $1 trillion in aggregate annual income.
- Government mandates including Section 508 of the Rehabilitation Act of 1973 and Texas HB 2819.
- Universal design. Users of mobile devices face many of the same challenges as users of assistive technology.
Disabilities Affected by Web Design
- 1.3 legally blind and 14.1 million with other visual disabilities including low vision- Macular degeneration and glaucoma and color blindness
- Experience some of the issues: Vischeck and Webexhibits
- Situational: Screen magnification on iPhones
- 2.5 million can't grasp or handle small objects, paralysis, tremor, loss or damage of limb(s), Cerebral palsy, Muscular dystrophy, Multiple sclerosis
- Situational: using a mobile device to access web
Auditory Hearing Loss
- 421,000 deaf and 36.4 million with "hearing trouble"
- Situational: Watching TV in gym with no sound
Cognitive/Learning Learning Disabilities
- Attention Deficit Hyperactivity Disorder (ADHD) - 4.4% of adults, brain Injury, genetic Disorders
- Situational: International readers
Statistics are estimates and US based: Sources: CDC Viral and Health Statistics Series 10, Dec. 2006; AFB, Gallaudet.