Table 2.
Relative and absolute reliability analysis of psychological and physiological variables frequently used to assess mental fatigue.
| Measure | ICC(3,1) (IC95%) | ICC(3,1) (IC95%) General Guide 2 | p-Value | SEM (%) | MD (%) |
|---|---|---|---|---|---|
| Mental fatigue sensation 1 (a.u.) | 0.50 (0.15; 0.74) | Moderate (poor; moderate) | 0.012 | 26.1 | 72.3 |
| Motivation (a.u.) |
0.21 (−0.19; 0.54) | Poor (poor; moderate) | 0.19 | 1.5 | 4.2 |
| Emotional arousal (a.u.) |
0.36 (−0.02; 0.65) | Poor (poor; moderate) | 0.059 | 21.9 | 60.6 |
| Total mood disturbance (a.u.) | 0.59 (0.27; 0.79) | Moderate (poor; good) | 0.003 | 6.2 | 17.3 |
| EEG theta band (dB/Hz) |
0.32 (−0.07; 0.62) | Poor (poor; moderate) | 0.086 | 21.3 | 59.1 |
| EEG alpha band (dB/Hz) |
0.30 (−0.09; 0.61) | Poor (poor; moderate) | 0.10 | 35.1 | 97.1 |
95% CI is 95% confidence interval; ICC is intraclass correlation; SEM is standard error of measurement; and MD is minimal difference; Reliability results were expressed as a percentage of original or rescaled results (0–100%); 1 Mental fatigue sensation assessed through VAS; 2 Koo, T. K., & Li, M. Y. (2016). A Guideline of Selecting and Reporting Intraclass Correlation Coefficients for Reliability Research. Journal of chiropractic medicine, 15(2), 155–163. https://doi.org/10.1016/j.jcm.2016.02.012, accessed on 12 October 2020.