Exercise Psychophysiology Research Group, School of Arts, Sciences and Humanities, University of São Paulo, São Paulo 03828-000, Brazil.
Human Movement Science and Rehabilitation Program, Federal University of São Paulo, Santos 11015-020, Brazil.
Int J Environ Res Public Health. 2021 Sep 10;18(18):9532. doi: 10.3390/ijerph18189532.
This study provided a proof-of-concept and test-retest reliability of measures frequently used to assess a mental fatigue paradigm. After familiarization, 28 healthy men performed (40-min) the Rapid Visual Information Processing (RVP) test in a test-retest design, having mental fatigue sensation, motivation, emotional arousal, total mood disturbance, and electroencephalography (EEG) in the prefrontal cortex measured before and after the test. EEG was recorded during a 3-min rest so that the power spectral density of theta (3-7 Hz) and alpha (8-13 Hz) bands was calculated. Pre-to-post RVP test changes in psychological and physiological domains were compared (paired-T tests), and absolute (standard error of measurement (SEM) and minimal difference (MD)) and relative reliability (intraclass correlation coefficient (ICC)) were calculated. The RVP test induced an increase ( < 0.05) in mental fatigue sensation (120.9% (109.4; 132.4)) and total mood disturbance (3.5% (-6.3; 13.3)), and a decrease in motivation (-7.1% (-9.2; -5.1)) and emotional arousal (-16.2% (-19.1; -13.2)). Likewise, EEG theta (59.1% (33.2; 85.0); < 0.05), but not alpha band, increased due to RVP test. All psychophysiological responses showed poor-to-moderate relative reliability. Changes in mental fatigue sensation and motivation were higher than SEM and MD, but changes in EEG theta band were higher only than SEM. Mental fatigue sensation, motivation, and EEG theta band were sensitive to distinguish a mental fatigue paradigm despite true mental fatigue effects on theta activity may be trivial.
本研究提供了一个概念验证和测试-再测试可靠性的措施，常用于评估精神疲劳范式。在熟悉之后，28 名健康男性在测试-再测试设计中进行了（40 分钟）快速视觉信息处理（RVP）测试，在测试前后测量了精神疲劳感觉、动机、情绪唤醒、总心境干扰和前额叶皮层的脑电图（EEG）。在 3 分钟的休息期间记录 EEG，以便计算θ（3-7 Hz）和α（8-13 Hz）频段的功率谱密度。比较了 RVP 测试前后心理和生理领域的变化（配对 T 检验），并计算了绝对（测量标准误差（SEM）和最小差异（MD））和相对可靠性（组内相关系数（ICC））。RVP 测试引起了精神疲劳感觉（120.9%（109.4；132.4））和总心境干扰（3.5%（-6.3；13.3））的增加，以及动机（-7.1%（-9.2；-5.1））和情绪唤醒（-16.2%（-19.1；-13.2））的降低。同样，由于 RVP 测试，EEG 中的θ带（59.1%（33.2；85.0））增加，但α频段没有增加。所有心理生理反应的相对可靠性都较差到中等。精神疲劳感觉和动机的变化高于 SEM 和 MD，但 EEGθ 带的变化仅高于 SEM。尽管θ 活动的真正精神疲劳效应可能微不足道，但精神疲劳感觉、动机和 EEGθ 带对区分精神疲劳范式具有敏感性。
