Department of Experimental Psychology, Utrecht University, Utrecht, The Netherlands.
Psychophysiology. 2010 Nov;47(6):1119-26. doi: 10.1111/j.1469-8986.2010.01028.x.
Mental fatigue has a wide range of effects on cognitive, behavioral, and motivational measures. It can be expected that specific effects in which fatigue becomes manifest is dependent on the nature of fatigue-inducing activity (e.g., level of control and working memory demands). This study examined how fatigue caused by tasks that differ on the level of working memory demands (0-Back, 2-Back) affects brain function (novelty processing, P3a) and performance (driving). Results showed that fatigue did not affect driving performance. Fatigue did reduce P3a amplitude, but only after 2-Back. P3a was also reduced during driving. The effects of fatigue and driving on P3a were additive. In summary, both driving and fatigue reduced P3a amplitude. Driving effects were always present. Fatigue effects on novelty processing were dependent on the cognitive demands of the fatigue-inducing task.
精神疲劳对认知、行为和动机测量有广泛的影响。可以预期，疲劳表现出的特定影响取决于引起疲劳的活动的性质（例如，控制水平和工作记忆需求）。本研究考察了不同工作记忆需求水平（0 回、2 回）的任务引起的疲劳如何影响大脑功能（新颖性处理、P3a）和表现（驾驶）。结果表明，疲劳不会影响驾驶表现。疲劳确实降低了 P3a 幅度，但仅在 2 回之后。在驾驶过程中 P3a 也减少了。疲劳和驾驶对 P3a 的影响是相加的。总之，驾驶和疲劳都会降低 P3a 幅度。驾驶的影响总是存在的。疲劳对新颖性处理的影响取决于引起疲劳的任务的认知需求。
