05 Accessibility Flashcards
1
Q
Accessibility: Motivation
A
Image
- Driving Innovation
- Enhancing brand
Increase market reach
- > 15% of the world’s population have a recognized disability
- additionally aged population have unrecognized disability
- in countries with life expectancies > 70 y, people spend 11,5% of their lifespan with a disability
- Global estimation: 2.3 billion people controlling 6.9 trillion $ in annual disposable income
Minimize Legal Risk
- 2008 target case: sued for 6 million $ due to broken online shop
2
Q
Web Accessibility
A
Web accessibility means that websites, tools and technologies are designed and developed so that people with disabilities can use them. More specifically, people can:
- perceive, understand, navigate and interact with the Web
- contribute to the Web
Web accesibility also benefits people without disabilities
3
Q
Accessibility: Alt texts
A
- Images not bad for accessibility - they increase comprehension for most audiences
Rules for alternative texts:
- be accurate, equivalent, succint
- do not be redundant
- do not use phrases “Image of” or “graphic of”
- present content as well as function
- depends on context
- always declare the alt attribute
Special Image usages exist
- Image maps: One image with multiple link areas, e.g. a world map
- background images
- logos
4
Q
Accessible Videos
A
- textual summary (similar to alt-text)
- captions (synchronised with stream)
- includes speed (subtitles) and other sound
- even possible for live streams
5
Q
Accessibility as a matter
A
through CMS:
- (semi-) automatic accessibility
- at least: user-aiding
“clean and tidy” webistes
- barely more complex
- maintenance less complex
- changes more easy to implement
- search engine optimized
understanding accessibility and barrier-freeness
6
Q
Accessibility summary
A
- reasonable and correct usage of technology
- rise problem-awareness
- checking all alternatives vs. obeying technology-unaware laws
- contradiction between guidelines and need
