Table 2.

Description of critical tasks for the simulated use assessment.

Simulated use task	Success criteria
Users clip sensors onto shoes	User puts on sensors from a stable position (such as sitting down)
Adjust the volume so that the volume is loud enough without being uncomfortable	The audio volume is loud enough for the user to hear without being uncomfortable
Stow device—user keeps touchscreen device where it does not impact their environmental awareness and personal stability	The user keeps a touchscreen device where it does not impact their environmental awareness and personal stability
Remove sensors from shoes	Foot sensors are removed from shoes from a stable position (such as sitting down)