Issue #5: Do AT users update?
•Screen reader?
•Mostly.
screen-reader-updates.jpg
•Browser?
•Questionable.
browsers-used.jpg
http://www.webaim.org/projects/screenreadersurvey/
From 2008/09 screen reader user survey @ webaim.org, good all-round resource for accessibility info.

Remember, to use ARIA you need a browser that both supports ARIA and is supported by a screen reader that also support ARIA.


- 75% of respondents update to a new version of screen reader within 12 months.

- Notice the very low percentage of IE 8 users.

-So safe to assume that under 50% of screen reader users can leverage ARIA functionality.