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Related Experiment Videos

Task demand as reflected in catecholamine excretion and heart rate.

M Frankenhaeuser, G Johansson

    Journal of Human Stress
    |March 1, 1976
    PubMed
    Summary

    Physiological arousal, including adrenaline and heart rate, increased with higher task demands in a color-word conflict task. Performance measures were unaffected by task difficulty or auditory interference.

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    Area of Science:

    • Cognitive Psychology
    • Psychophysiology

    Background:

    • Cognitive conflict tasks, like the Stroop test, are used to study attention and executive functions.
    • Understanding the physiological correlates of cognitive load is crucial for assessing task difficulty.

    Purpose of the Study:

    • To investigate the immediate effects and aftereffects of a color-word conflict task with varying levels of demand.
    • To compare physiological arousal indices and performance measures under single and double conflict conditions.

    Main Methods:

    • Two groups performed a color-word conflict task: one with single auditory conflict, the other with double auditory conflict.
    • Measured physiological arousal (adrenaline excretion, heart rate) and performance metrics.

    Main Results:

    • Physiological arousal indices were more sensitive to task demand than performance measures.
    • The double-conflict task led to greater increases in adrenaline and heart rate during and after the task.
    • Performance measures remained consistent across both single and double conflict conditions.

    Conclusions:

    • Higher cognitive task demands significantly impact physiological arousal but not necessarily task performance.
    • Adrenaline excretion and heart rate serve as sensitive indicators of cognitive load and stress.

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