Table 2 Mean and standard deviation for the NASA TLX questionnaire results for every condition
Device | Control model | Mental demand | Physical demand | Temporal demand | Performance | Effort | Frustration |
|---|---|---|---|---|---|---|---|
External robotic manipulator | Sync | 8.44 | 1.81 | 3.75 | 4.06 | 6.25 | 4.00 |
(3.06) | (1.95) | (2.89) | (3.28) | (3.07) | (2.50) | ||
Async | 6.69 | 2.81 | 2.88 | 3.56 | 4.94 | 3.44 | |
(1.75) | (2.71) | (2.30) | (2.62) | (2.27) | (3.01) | ||
Whole-arm exoskeleton | Sync | 7.25 | 3.50 | 3.05 | 4.40 | 6.15 | 4.50 |
(1.25) | (2.66) | (2.92) | (2.95) | (2.70) | (3.20) | ||
Async | 6.89 | 3.50 | 3.78 | 5.11 | 5.00 | 4.33 | |
(1.51) | (2.69) | (3.45) | (3.42) | (2.58) | (3.13) |