Table 2.
Results of vigilance test
| Measures | All (n = 136) | COVID (n = 53) | Control (n = 83) | Statistic | |
|---|---|---|---|---|---|
| Accuracy | Baseline accuracy (averaged over the first 3 min), % (SD) | 77.3 (19.8) | 75.5 (19.2) | 78.5 (20.2) | t(135) = −0.9, P = 0.4, BF = 3.8 |
| Final accuracy (averaged over the first 3 min), % (SD) | 72.4 (22.0) | 67.8 (23.0) | 75.4 (20.9) | t(135) = −2.0, P = 0.05, BF = 1.1 | |
| Accuracy over 9 min, % (SD) | 74.7 (20.0) | 71.4 (19.8) | 76.8 (20.0) | t(135) = −1.5, P = 0.1, BF = 1.9 | |
| Absolute change in accuracy (final minus baseline), % (SD) | −4.9 (10.1) | −7.7 (10.3) | −3.0 (9.5) | t(135) = −2.7, P = 0.008, BF = 5.0 | |
| Vigilance decrement, i.e. change in accuracy normalized by individual baseline, mean % (SD) | −5.4 (25.7) | −12.3 (17.4) | −0.9 (29.1) | t(135) = −2.6, P = 0.01, BF = 3.8 | |
| RT | RT over 9 min, s (SD) | 0.5 (0.1) | 0.5 (0.1) | 0.5 (0.1) | t(134) = −0.2, P = 0.8, BF = 5.2 |
| Absolute change in RT (final minus baseline), s (SD) | 0.02 (0.1) | 0.01 (0.1) | 0.02 (0.1) | t(130) = −0.8, P = 0.4, BF = 4.0 | |
| Change in RT normalized by individual baseline, % (SD) | 4.0 (10.3) | 3.0 (12.2) | 4.6 (8.9) | t(130) = −0.9, P = 0.4, BF = 3.8 | |
| Ratings | Baseline fatigue rating (average over the first 3 min), % (SD) | 57.7 (28.6) | 65.1 (27.2) | 52.8 (28.6) | t(135) = 2.5, P = 0.01, BF = 3.1 |
| Fatigue rating, average over 9 min% (SD) | 63.3 (26.2) | 68.2 (25.7) | 60.1 (26.1) | t(135) = 1.8, P = 0.08, BF = 1.3 | |
| Change in fatigue rating (last 3 min minus first 3 min), % (SD) | 11.6 (17.5) | 7.9 (17.4) | 14.1 (17.2) | t(135) = −2.1, P = 0.04, BF = 1.3 | |
| Baseline motivation rating, % (SD) | 54.6 (24.6) | 52.9 (26.4) | 55.7 (23.4) | t(135) = −0.7, P = 0.5, BF = 4.4 | |
| Motivation rating, average over all ratings% (SD) | 46.3 (24.5) | 45.2 (26.4) | 47.0 (23.3) | t(135) = −0.4, P = 0.7, BF = 4.9 | |
| Change in motivation rating (last 3 min minus first 3 min), % (SD) | −16.3 (17.8) | −15.7 (17.0) | −16.7 (18.4) | t(135) = 0.3, P = 0.8, BF = 5.1 | |
T-tests used to assess between-group differences, with Bayes Factor (BF) reported. The significant t-tests are highlighted in bold.