Evaluation of an intelligent wheelchair system for older adults with cognitive impairments

Table 2 Summary of the outcome measures used for user trials

	Measurement category
	Safety	Usability
Objective component	-Movement pass rate (ability to complete essential movements without a collision).	-Time to complete obstacle course run.
Objective component	-Number of collisions (FOV).	-Adherence to audio prompts.
Subjective component		-NASA-TLX (Task Load Index) score.
Subjective component	-QUEST 2.0: safety item.	-QUEST 2.0: simplicity of use item.

Note: QUEST 2.0 total score was also used to gauge overall user satisfaction of the device.

ISSN: 1743-0003