Table 1.
Overall system usability test results
| Usability (1–5: Strongly disagree—strongly agree) | All (N = 10) | Range (N = 10) | Novice (N = 6) | Expert (N = 4) |
|---|---|---|---|---|
| I think the exosuit is complex to use | 1.20 ± 0.42 | 1–2 | 1.16 ± 0.41 | 1.25 ± 0.50 |
| I think most users can quickly learn to use the exosuit | 4.90 ± 0.32 | 4–5 | 4.83 ± 0.41 | 5.00 ± 0.00 |
| I am confident when using the exosuit | 4.80 ± 0.42 | 4–5 | 4.67 ± 0.52 | 5.00 ± 0.00 |
| Overall System Usability Score (SUS) | 92.8 ± 5.3 | 82.5–100 | 92.9 ± 4.3 | 92.5 ± 7.4 |
| Test category | A- ll (N = 10) | Range (N = 10) | Novice (N = 6) | Expert (N = 4) |
|---|---|---|---|---|
| Time-To-Don (s) | 35.6 ± 2.5 | 24.7–49.6 | 38.2 ± 3.2 | 31.7 ± 3.7 |
| Time-To-Lift (s) | 45.3 ± 2.8 | 33.2–59.0 | 48.0 ± 3.2 | 41.1 ± 4.7 |
| Time-To-Doff (s) | 7.2 ± 0.4 | 5.6–9.3 | 7.3 ± 0.6 | 7.2 ± 0.8 |
Note: For the system usability test, time-to-don, time-to-lift, time-to-doff, and usability scores were evaluated with 10 participants (6 novices, 4 expert users). For the usability score, participants were asked to answer ten questions, including the three in this table, from strongly disagree to strongly agree on a scale of 1–5. Data shown are mean and standard deviation, excluding range.