Table 2.
Participant agreement with Systems Usability Scale (SUS) items after using ClereMed (1=strongly disagree, 2=disagree, 3=neutral, 4=agree, 5=strongly agree) and mean SUS score (n=44a).
|
|
Mean Agreement (SD) | MeanSUS Score (SD)b |
| 1. I think that I would like to use ClereMed frequently | 3.05 (1.71) |
5.11 (4.28) |
| 2. I found ClereMed unnecessarily complex | 1.70 (1.42) | 8.24 (3.56) |
| 3. I thought ClereMed was easy to use | 4.39 (1.35) | 8.47 (3.38) |
| 4. I think that I would need the support of a technical person to be able to use ClereMed | 2.52 (1.59) | 6.19 (3.98) |
| 5. I found the various functions in ClereMed were well integrated | 4.25 (1.24) | 8.13 (3.10) |
| 6. I thought there was too much inconsistency in ClereMed | 1.45 (1.04) | 8.86 (2.61) |
| 7. I would imagine that most people would learn to use ClereMed very quickly | 4.14 (1.37) | 7.84 (3.44) |
| 8. I found ClereMed very cumbersome to use | 1.55 (1.23) | 8.64 (3.07) |
| 9. I felt very confident using ClereMed | 4.16 (1.29) | 7.90 (3.23) |
| 10. I needed to learn a lot of things before I could get going with ClereMed | 2.27 (1.72) | 6.82 (4.29) |
| Learnability scorec | - | 65.06 (35.72) |
| Usability scored | - | 78.98 (20.19) |
| Total SUS score | - | 76.19 (20.67) |
aThree participants who had severe vision impairment tried but could not test the app.
bOdd numbered items (1, 3, 5, 7, 9) were scored by subtracting 1 from the mean agreement and multiplying by a factor of 2.5. Even numbered items (2, 4, 6, 8, 10) were scored by subtracting the mean agreement from 5 and then multiplying by a factor of 2.5.51
cLearnability is represented by factors 4 and 10.
dUsability is represented by factors 1-3 and 5-9.