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Verbal fluency: normative data.

N R Cauthen

    Journal of Clinical Psychology
    |January 1, 1978
    PubMed
    Summary

    Cognitive aging affects verbal fluency differently based on IQ. While younger adults showed no age or IQ differences, older adults’ verbal fluency varied significantly with IQ, not age.

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    Area of Science:

    • Cognitive psychology
    • Neuroscience
    • Gerontology

    Background:

    • Verbal fluency is a key cognitive function.
    • Aging can impact cognitive abilities, including verbal fluency.
    • The relationship between intelligence and verbal fluency across the lifespan requires further investigation.

    Purpose of the Study:

    • To examine how age and intelligence (IQ) influence verbal fluency.
    • To compare verbal fluency performance between younger and older adult groups.
    • To determine if task difficulty interacts with IQ in different age groups.

    Main Methods:

    • Administered a verbal fluency task and the Wechsler Adult Intelligence Scale (WAIS).
    • Recruited two participant groups: younger adults (20-59 years) and older adults (60-94 years).
    • Analyzed verbal fluency data across different age ranges and IQ levels.

    Main Results:

    • In younger adults, verbal fluency did not differ significantly by IQ or age decade.
    • In older adults, verbal fluency showed significant differences across IQ ranges but not across age decades.
    • Task difficulty, assessed by letter association ease, did not interact with IQ in either age group.

    Conclusions:

    • Intelligence, not age, appears to be a significant factor in verbal fluency for older adults.
    • Cognitive aging may affect verbal fluency through mechanisms related to crystallized intelligence.
    • The findings suggest IQ's role in maintaining verbal fluency in later life, independent of task complexity.

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