Laboratory study demonstrates decreased heart rate during work underload, highlighting physiological markers for monitoring cognitive disengagement in aerospace settings.
The findings of a laboratory investigation of the relationship between the subjective and physiological components of work underload are reported. The subjective component is described in terms of the subjective work underload checklist, mental effort, and cognitive arousal. The physiological component is defined in terms of heart rate and heart rate variability. Evidence for an increase in work underload with a decrease in heart rate is provided. The relevance of this research to the aerospace environment is discussed and the need to investigate the behavioural component of work underload emphasized.
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Braby et al. (1993) studied this question.
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