Marcelo Paiva

All criteriaPresent as slides

A bearded man in a wheelchair holds a phone in a corridor lined with doors, surrounded by swirling clouds.Meant to show: A man in a power wheelchair, his phone bolted to a mounting arm

Success criterion 2.5.4

Motion Actuation

Functions triggered by moving the device or the user can also be operated through the interface, and motion response can be disabled.

  • Level A
  • Principle 2: Operable
  • Guideline 2.5: Input Modalities

In a user’s words

“Shake to undo? My phone is bolted to my wheelchair. Shall I shake the whole chair?”

Who this helps: Motor Impairments

What each role can do

Product manager
Never ship a motion-only feature.
Designer
Provide an on-screen control for every shake, tilt or gesture feature.
Developer
Add a button alternative and a setting to turn off motion activation.
Tester
Complete every motion-triggered task with the device held still, and confirm motion can be disabled.

Once it is fixed

“An Undo button, right there on the screen. My chair and I thank you!”

The quotes are written to illustrate the criterion. They are not testimonials from real people. For the official wording, find 2.5.4 in the W3C quick reference for WCAG 2.2 (opens in a new tab).

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