Mental fatigue and the efficiency of information processing in relation to work times

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Abstract

Mental fatigue was studied by analysing performance and mental effort in a memory search task in relation to the temporal structuring of preceding work periods.

Performance was measured by reaction time and error rate. Mental effort was measured via spectral analysis of the 0.10 Hz component in the heart rhythm signal.

It was shown that subjects protected their performance by spending more effort in the unfavorable conditions: after several hours of work and after continuous work without short rest breaks. In the most unfavorable condition, after 8 h of work combined with sleep loss, the efficiency of information processing broke down. Performance could no longer be protected by invested effort. This breakdown phenomenon is interpreted as a serious sign of mental fatigue. Relevance to industry

The present study describes a method of analysing mental fatigue, based on the analysis of the performance related to the mental effort invested in a standard memory-search task. This method could be applied in the practical evaluations of work systems.

References (45)

  • A. Craig et al.

    Symptoms of acute and chronic fatigue

  • A.F. Sanders

    Towards a model of stress and human performance

    Acta Psychologica

    (1983)
  • J. Aasman et al.

    Operator effort and the measurement of heart-rate variability

    Human Factors

    (1987)
  • J. Aasman et al.

    Measuring mental fatigue in normal daily work routines

  • T. Akerstedt

    Sleepiness as a consequence of shift work

    Sleep

    (1988)
  • T. Akerstedt

    Sleepiness at work: Effects of irregular work hours

  • E.A. Alluisi et al.

    Temporal factors in human performance and productivity

  • F.C. Bartlett

    Fatigue following highly skilled work

  • F.C. Bartlett

    Psychological criteria of fatigue

  • D.E. Broadbent

    Is a fatigue test now possible?

    Ergonomics

    (1979)
  • J.J. Campbell

    Effects of sleep and circadian rhythms on performance

  • R.A. Cohen et al.

    Response selection and the executive control of attention

  • J. Daniel et al.

    Oral temperature and performance in 8 h and 12 h shifts

    Ergonomics

    (1989)
  • R. Dodge

    Mental work, a study in psychodynamics

    Psychol. Review

    (1913)
  • P.S. Florence

    Economics of Fatigue and Unrest and the Efficiency of Labour in English and American Industry

  • O. Graf

    Uber lohnenste Arbeitspausen bei geistiger Arbeit

    Psychol. Arbeit.

    (1922)
  • O. Graf

    Uber Pausenwirkung bei Arbeit mit verschiedener Willensanspannung

    Psychol. Arbeit.

    (1926)
  • G.R.J. Hockey

    A state control theory of adaptation to stress and individual differences in stress management

  • G.R.J. Hockey

    Cognitive-energetic control mechanisms in the management of work demands and psychological health

  • D.H. Holding

    Fatigue

  • D. Kahneman

    Attention and Effort

  • Cited by (0)

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