Table 4.
Wilcoxon signed-rank test by treatment for mental workload.
| NASA-TLX index | Experiment treatment |
Wilcoxon signed-rank test |
|||
|---|---|---|---|---|---|
| Interactive (Mean, SD) | Interactive & analytical (Mean, SD) | U | r | p-value | |
| Mental demand | 62.3 (21.7) | 59.0 (23.3) | −1.025 | 0.0796 | 0.305 (ns) |
| Temporal demand | 51.6 (28.3) | 49.1 (27.2) | −0.945 | 0.0733 | 0.345 (ns) |
| Performance | 58.4 (26.6) | 61.9 (25.5) | −1.248 | 0.0969 | 0.212 (ns) |
| Effort | 47.7 (26.9) | 43.1 (28.0) | −1.211 | 0.0940 | 0.226 (ns) |
| Frustration | 60.4 (22.1) | 56.4 (23.8) | −1.485 | 0.1153 | 0.137 (ns) |
*** p < 0.001, ** p < 0.01, * p < 0.05, † p < 0.1, ns = not significant.