Understanding SC 2.2.3:No Timing (Level AAA)

Intent

The intent of this Success Criterion is to minimize the occurrence of content that requires timed interaction. This enables people with blindness, low vision, cognitive limitations, or motor impairments to interact with content. This differs from the Level A Success Criterion in that the only exception is for real-time events.

Benefits

• People with physical disabilities often need more time to react, to type and to complete activities. People with low vision need more time to locate things on screen and to read. People who are blind and using screen readers may need more time to understand screen layouts, to find information and to operate controls. People who have cognitive or language limitations need more time to read and to understand. People who are deaf and communicate in sign language may need more time to read information printed in text (which may be a second language for some).
• In circumstances where a sign-language interpreter may be relating audio content to a user who is deaf, control over time limits is also important.

Examples

• A test is designed so that time to complete the test does not affect the scoring

  Rather than calibrating an on-line test using a time limit, the test is calibrated based on scores when users have no time limits.

• A game is designed so that users take turns rather than competing in real-time

  One party can pause the game without invalidating the competitive aspect of it.

Techniques

Each numbered item in this section represents a technique or combination of techniques that the WCAG Working Group deems sufficient for meeting this Success Criterion. However, it is not necessary to use these particular techniques. For information on using other techniques, see Understanding Techniques for WCAG Success Criteria, particularly the "Other Techniques" section.