Results of the item selection from the ISONORM 9241/10 questionnaire.
Items
Descriptives
One-sample t-test (two-tailed; test value = 4)
Distribution
N
M
SD
T
df
Mean difference
95% confidence interval of the difference
Lower
Upper
(1) The app is complicated to operate.
26
2.85
1.29
−4.57
25
0.000
−1.154
−1.67
−0.63
(2) The app uses easily understandable terms, names, abbreviations, or symbols in the screens and menus.
26
5.65
1.06
7.99
25
0.000
1.654
1.23
2.08
(3) The app provides information in adequate extent which entries are permitted or required.
26
4.50
1.63
1.56
25
0.131
0.500
−0.16
1.16
(4) The app facilitates orientation through a consistent look.
26
4.73
1.51
2.47
25
0.21
0.731
0.12
1.34
(5) The app lets one in the dark about whether an entry was successful or not.
25
4.04
1.88
0.11
24
0.916
0.040
−0.74
0.82
(6) The app sufficiently informs about what it is doing.
26
3.58
1.47
−1.46
25
0.156
−0.423
−1.02
0.17
(7) The app requires just a little time to learn how to use it.
26
6.15
0.73
15.01
25
0.000
2.154
1.86
2.45
(8) The app requires that you have to remember many details.
26
2.38
1.36
−6.06
25
0.000
−1.615
−2.16
−1.07
(9) The app is easy to learn without further assistance or a user manual.
26
6.23
0.77
14.88
25
0.000
2.231
1.92
2.54
M, mean; SD, standard deviation; −−−, Does not apply at all; −−, does not apply; −, rather does not apply; −/+, undecided; +, rather applies; ++, applies; +++, applies fully.
