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Cognitive task avoidance correlates with fatigue-induced performance decrement but not with subjective fatigue
Charles-Etienne Benoit1, Oleg Solopchuk2, Guillermo Borragán3
1Institute of Neuroscience, Université catholique de Louvain (UCL), B-1200 Brussels, Belgium.
Neuropsychologia
|June 25, 2018
Summary
Mental fatigue, characterized by exhaustion and performance decline, does not systematically increase task avoidance. Instead, avoidance variations correlate with performance decrements, suggesting anticipatory regulation.
Area of Science:
- Cognitive Neuroscience
- Psychology
Background:
- Mentally demanding tasks require effort and are often avoided.
- Prolonged cognitive engagement induces mental fatigue, marked by subjective exhaustion and performance decline.
Purpose of the Study:
- To experimentally investigate the effect of mental fatigue on effort cost.
- To determine if fatigue influences task avoidance and subjective effort perception.
Main Methods:
- Sixty participants completed a forced-choice working memory task after fatigue-inducing or control manipulations.
- Fatigue was measured via subjective feeling and performance; effort was assessed through subjective perception and task avoidance.
Main Results:
- Task avoidance showed weak influence from fatigue manipulation but correlated with performance decline.
- Subjective fatigue and effort perception measures were largely unrelated.
- Reward influenced task decisions more than task difficulty.
Conclusions:
- Subjective mental fatigue may develop independently of task avoidance.
- Findings support an "anticipatory regulation" model where fatigue signals potential future performance issues.
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