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Aging and the Stroop effect: a meta-analysis

P Verhaeghen1, L De Meersman

  • 1Department of Psychology, University of Leuven, Belgium. pverhaeg@psych.syr.edu

Psychology and Aging
|April 9, 1998
PubMed
Summary
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The Stroop interference effect shows no significant age differences between younger and older adults. Apparent age-related slowing in cognitive tasks is likely due to general processing speed declines.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Aging Research

Background:

  • The Stroop interference effect is a common measure to assess cognitive control.
  • Previous research has yielded mixed results regarding age differences in Stroop performance.
  • Understanding age-related cognitive changes is crucial for maintaining quality of life in older adults.

Purpose of the Study:

  • To systematically analyze the Stroop interference effect across different age groups.
  • To determine if age differences in Stroop performance are significant or an artifact of other factors.
  • To investigate potential moderator variables influencing age-related Stroop performance.

Main Methods:

  • A meta-analysis was conducted on data from 20 studies, encompassing 15 articles.

Related Experiment Videos

  • Standardized mean differences were calculated to compare Stroop interference between younger and older adults.
  • Brinley analysis and information loss models were employed to assess age-condition interactions and general slowing.

    • Main Results:

    • No significant difference in the Stroop interference effect was found between younger (d = 2.04) and older adults (d = 2.17).
    • Moderator variables did not account for any observed age differences.
    • Brinley analysis (R2 = .83) and information loss modeling (age ratio of decay rates = 1.4) indicated no Age x Condition interaction, supporting a general slowing hypothesis.

    Conclusions:

    • The Stroop interference effect does not significantly differ between younger and older adults.
    • Apparent age-related differences in Stroop performance are likely an artifact of general age-related slowing in processing speed.
    • This finding has implications for understanding cognitive aging and the interpretation of cognitive control measures.