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A multifaceted investigation of the link between mental fatigue and task disengagement
Author(s) -
Hopstaken Jesper F.,
Linden Dimitri,
Bakker Arnold B.,
Kompier Michiel A. J.
Publication year - 2015
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/psyp.12339
Subject(s) - disengagement theory , psychology , mental fatigue , task (project management) , cognitive psychology , pupil diameter , developmental psychology , pupil , clinical psychology , gerontology , medicine , management , neuroscience , economics
Mental fatigue is often characterized by reduced motivation for effortful activity and impaired task performance. We used subjective, behavioral (performance), and psychophysiological ( P 3, 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, P 3 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.