Table 1.

System Usability Scale questionnaire scores from the laboratory usability test.

Questions	P1a	P2	P3	P4	P5	P6	Mean (SD)
I think that I would like to use this app frequently	3b	3b	3b	3b	4c	4c	3.3 (0.5)
I found this app unnecessarily complex	2c	2c	2c	1c	2c	1c	1.6 (0.5)
I thought this app was easy to use	5c	4c	4c	4c	4c	5c	4.3 (0.5)
I think I would need assistance to be able to use this app	1c	3b	1c	1c	2c	4d	2 (1.3)
I found the various functions in this app to be well integrated	5c	5c	4c	4c	3b	5c	4.3 (0.8)
I thought there was too much inconsistency in this app	2c	2c	2c	1c	1c	1c	1.5 (0.5)
I imagine that most people would learn to use this app very quickly	4c	5c	3b	5c	5c	4c	4.3 (0.8)
I found this app very cumbersome/awkward to use	1c	2c	2c	1c	1c	1c	1.3 (0.5)
I felt very confident using this app	5c	4c	3b	5c	5c	4c	4.3 (0.8)
I needed to learn a lot before I could get going with this app	1c	3b	1c	1c	2c	1c	1.5 (0.8)
Scores	87.5	72.5	75	90	82.5	85	—e
Average	82	—	—	—	—	—	—

^aPx: participant x.

^bNeutral response: neither agree nor disagree.

^cPositive response: agree or strongly agree for positive questions; disagree or strongly disagree for negative questions.

^dNegative response: agree or strongly agree for negative questions; disagree or strongly disagree for positive questions.

^eNot applicable.