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Stroop interference, practice, and aging.

Douglas J Davidson, Rose T Zacks, Carrick C Williams

    Neuropsychology, Development, and Cognition. Section B, Aging, Neuropsychology and Cognition
    |January 5, 2007
    PubMed
    Summary
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    Older adults show practice-related improvements on the Stroop color-word interference task, similar to younger adults. However, older adults consistently exhibit a larger interference effect even after extensive practice.

    Area of Science:

    • Cognitive Psychology
    • Neuroscience
    • Human Development

    Background:

    • The Stroop color-word interference task is a standard measure of executive function.
    • Investigating practice effects helps understand cognitive plasticity and aging.
    • Previous research suggests age-related differences in cognitive task performance.

    Purpose of the Study:

    • To examine how practice influences Stroop color-word interference in older and younger adults.
    • To compare the magnitude and pattern of practice effects between age groups.
    • To determine if older adults benefit from practice to the same extent as younger adults.

    Main Methods:

    • Two experiments utilized a computerized, single-item Stroop task with voice response.
    • Participants completed hundreds of trials to assess practice effects.

    Related Experiment Videos

  • Interference effect size was measured across trials for both older and younger adults.

    • Main Results:

    • Both age groups demonstrated a practice-related reduction in the Stroop interference effect.
    • Older adults consistently showed a larger interference effect compared to younger adults throughout practice.
    • Practice patterns were generally similar across both age groups, indicating comparable learning trends.

    Conclusions:

    • Older adults exhibit practice-related improvements in the Stroop task, mirroring younger adults.
    • Despite improvements, age-related differences in Stroop interference persist even with extensive practice.
    • Cognitive plasticity in response to practice is evident in older adults, though baseline differences remain.