Table 2.

Results of the perceived ease of use subscale questionnaire.

Item	Mean (SD)	Correlation with overall ease of use	P value
7. I do not become confused when I use ARNA.a	4.83 (1.43)	0.39	.054
8. I do not get frustrated when interacting with ARNA.	4.58 (1.58)	0.65	<.001
9. The system is flexible to work with.	3.54 (1.79)	0.51	.01
10. My interaction with ARNA is easy to understand.	5.83 (1.37)	0.58	.002
11. It is easy to remember how to perform tasks while using ARNA.	6.00 (1.35)	0.36	.08
12. Overall, I find ARNA easy to use.	5.42 (1.52)	1	<.001

^aARNA: Adaptive Robotic Nursing Assistant.