|
Section 508 Web Accessibility
- Timed Responses Guidelines
§1194.22(p) When a timed response is required, the user
shall be alerted and given sufficient time to indicate more
time is required.
Checkpoint
Does the site force a logout after a set amount of idle time
without alerting the user?
Explanation
Forced logouts are common for securing web applications. If there has been
no activity (e.g. submitting information to the database) after a preset
amount of time, the application will terminate that session, requiring the
user to log in again.
Guidelines
An application's maximum idle time is often determined by the owner's
security policy, but certain types of users must be considered when
determining an idle time value:
- Those who suffer with dyslexia may have to re-read certain passages.
- Those with certain visual disabilities may need more time to view the
page.
- Those who require assistive technology might not be able to navigate or
enter data fast enough.
- Those with limited physical mobility might not be able to
navigate or enter data fast enough.
Additionally, a page or application should alert the user when the session
is about to time out, and allow them the opportunity to request additional
time.
Checkpoint
Does the site contain a timed test that does not display remaining
time?
Explanation
Timed tests are common for on-line certification programs.
Guidelines
The time limit for an on-line test is usually calculated by the
test's author to coincide with the curriculum or with the intended
difficulty level. However, certain types of users must be
considered when determining an idle time value:
- Those who suffer with dyslexia may have to re-read certain passages.
- Those with certain visual disabilities may need more time to view the
page.
- Those who require assistive technology might not be able to navigate
or enter data fast enough.
- Those with limited physical mobility might not be able to
navigate or enter data fast enough.
The time remaining must be displayed somewhere within the user
agent (e.g. a countdown clock can be displayed on a web browser).
However, it is understood that assistive technology will probably
have difficulty identifying such a countdown clock.
|
