A multifaceted investigation of the link between mental fatigue and task disengagement

Jesper F. Hopstaken · Dimitri van der Linden · Arnold B. Bakker · Michiel A. J. Kompier

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Sleep and Work-Related Fatigue Human-Automation Interaction and Safety Mind wandering and attention

Abstract

Mental fatigue is often characterized by reduced motivation for effortful activity and impaired task performance. We used subjective, behavioral (performance), and psychophysiological (P3, pupil diameter) measures during an n-back task to investigate the link between mental fatigue and task disengagement. After 2 h, we manipulated the rewards to examine a possible reengagement effect. Analyses showed that, with increasing fatigue and time-on-task, performance, P3 amplitude, and pupil diameter decreased. After increasing the rewards, all measures reverted to higher levels. Multilevel analysis revealed positive correlations between the used measures with time-on-task. We interpret these results as support for a strong link between task disengagement and mental fatigue.

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References

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