Table 4.
Effectiveness, efficiency, and satisfaction results of usability testing.
| Participant | Training time (min) | Time to complete app independently (min) | Total time (min) | Required assistance? | Image deemed usable by majority of raters | SUSa score | |
| Session 1 | |||||||
| P1 | 12.8 | 1.6 | 14.4 | No | Yes (AKAb stump) | 82.5 | |
| P2 | 2.7 | 3.1 | 5.8 | No | Yes (Abdomen) | 97.5 | |
| Yes (Groin) | |||||||
| P3 | 6.4 | 16.6 | 23.0 | Yes | No (Groin) | 72.5 | |
| P4 | 2.2 | 2.4 | 4.6 | No | Yes (Abdomen) | 87.5 | |
| Session 1 mean (SD) | 6.0 (4.9) | 5.9 (7.1) | 12.0 (8.6) |
|
85 (10.4) | ||
| Session 2 | |||||||
| P5 | 2.4 | 1.4 | 3.9 | No | Yes (BLEc fasciotomies) | 82.5 | |
| P6 | 3.2 | 6.2 | 9.4 | Yes | Yes (Groin) | 87.5 | |
| P7 | 2.1 | 6.4 | 8.5 | Yes | Yes (Lower extremity) | 75 | |
| No (Groin) | |||||||
| P8 | 8.0 | 4.7 | 12.7 | Yes | Yes (Abdomen) | 70 | |
| P9 | 2.9 | 2.2 | 5.1 | No | Yes (Abdomen) | 95 | |
| Session 2 mean (SD) | 3.7 (2.4) | 4.2 (2.3) | 7.9 (3.5) |
|
82 (9.9) | ||
| Overall | |||||||
| mean (SD) | 4.7 (3.7) | 5.0 (4.7) | 9.7 (6.2) |
|
83.3 (9.6) | ||
aSUS: System Usability Scale (scored 0-100).
bAKA: above the knee amputation.
cBLE: bilateral lower extremity.