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Intellectual functioning and aggression.

L R Huesmann, L D Eron, P W Yarmel

    Journal of Personality and Social Psychology
    |January 1, 1987
    PubMed
    Summary
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    Childhood aggression hinders intellectual development and adult achievement. This longitudinal study shows aggression and intellectual functioning are stable traits, passed across generations, impacting long-term outcomes.

    Area of Science:

    • Developmental Psychology
    • Behavioral Genetics
    • Cognitive Science

    Background:

    • Aggression and intellectual functioning are key developmental trajectories.
    • These traits exhibit stability across the lifespan and across generations.
    • Understanding their interplay is crucial for predicting life outcomes.

    Purpose of the Study:

    • To investigate the longitudinal relationship between childhood aggression and intellectual functioning.
    • To examine the intergenerational transmission of these traits.
    • To propose a dual-process model explaining their connection.

    Main Methods:

    • A 22-year longitudinal study involving over 600 subjects, their parents, and children.
    • Data collection focused on measures of aggressiveness and intellectual functioning.

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  • Statistical analyses examined stability, intergenerational patterns, and predictive relationships.

    • Main Results:

    • Both aggression and intellectual functioning demonstrated significant stability over time and across generations.
    • Childhood aggression negatively impacted intellectual development and predicted poorer adult intellectual achievement.
    • Early aggression predicted later intellectual achievement differences, even when controlling for early IQ.

    Conclusions:

    • Childhood aggression is a significant impediment to intellectual development and adult achievement.
    • A dual-process model suggests low intelligence may foster aggression, which in turn impedes further intellectual growth.
    • Findings highlight the importance of early intervention for aggression to improve long-term cognitive outcomes.