Interaction speed

[mikecrabb]

General Description

Users with physical disabilities or cognitive and learning disabilities may find some interactions too fast to keep up with or maintain.

REQ 15a: Allow users to change speed at which they travel through an immersive environment, or can perform interactions.

REQ 15b: Allow timings for interactions or critical inputs to be modified or extended.

REQ 15c: Provide an XR angel or helper for the user with a cognitive or learning disability.

REQ 15d: Provide clear start and stop mechanisms.

• https://www.w3.org/TR/xaur/#user-needs-definition

Functional Performance

Please see EN 301 549 for descriptions of functional performance areas.

• Usage without vision
• Usage with limited vision
• Usage without perception of colour
• Usage without hearing
• Usage with limited hearing
• Usage without vocal capability
• Usage with limited manipulation or strength
• Usage with limited reach
• Minimize photosensitive seizure triggers
• Usage with limited cognition
• Privacy

[bruce-usab]

Interaction speed is an issue with traditional captioning, but it is pretty well addressed. Many of the UIs let the user pause and/or rewind the textual display. Of course, real-time events may impose practical limits to this.

As noted on the call 6/8: Interaction speed is very much an issue in an XR setting. The challenges associated with traditional captioning are significantly multiplied, so this issues was categorized as Relevant for XR Captioning.