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Related Experiment Videos

Cortisol reactivity and cognitive performance in a continuous mental task paradigm.

N Bohnen1, P Houx, N Nicolson

  • 1Department of Neuropsychology and Psychobiology, University of Limburg, Maastricht, The Netherlands.

Biological Psychology
|October 1, 1990
PubMed
Summary
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High stress levels, measured by salivary cortisol, negatively impacted attention during demanding mental tasks. Lower stress responses did not affect attention, indicating individual differences in stress impact on cognitive performance.

Area of Science:

  • Neuroscience
  • Psychology
  • Endocrinology

Background:

  • Demonstrating the effects of fatigue or stress on cognitive performance is challenging.
  • Salivary cortisol serves as a physiological index of stress.
  • Individual differences in cognitive performance under stress are not well understood.

Purpose of the Study:

  • To investigate if salivary cortisol levels reflect individual differences in cognitive performance after prolonged mental activity.
  • To examine the impact of stress-induced cortisol on specific cognitive functions.

Main Methods:

  • A within-subject design exposed 24 participants to 4 hours of continuous mental activity and a control session.
  • Salivary cortisol was measured as a stress indicator.
  • Cognitive performance in verbal memory, concept shifting, and divided attention was assessed pre- and post-session.

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Main Results:

  • Significantly higher salivary cortisol levels were observed during the continuous mental task session compared to the control.
  • Participants with higher cortisol responses showed decreased divided attention after the task session.
  • No significant changes in verbal memory or concept shifting were found in either subgroup.

Conclusions:

  • Elevated salivary cortisol during demanding cognitive tasks is linked to a decline in divided attention.
  • Individual differences in cortisol response correlate with changes in attention, but not verbal memory or concept shifting.
  • This study highlights the differential impact of stress on specific cognitive functions based on individual physiological responses.