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Handedness and spatial ability

B Sanders, J R Wilson, S G Vandenberg

    Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
    |April 1, 1982
    PubMed
    Summary
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    This study found that handedness impacts spatial visualization differently in males and females across ethnic groups. Left-handed males generally showed better spatial skills, while left-handed females showed poorer skills compared to right-handed individuals.

    Area of Science:

    • Cognitive Psychology
    • Neuroscience
    • Human Behavior

    Background:

    • Handedness and cognitive abilities, particularly spatial visualization, have been areas of research interest.
    • Previous studies have yielded mixed results regarding handedness-related differences in spatial skills.
    • The influence of factors like sex, ethnicity, and degree of handedness requires further investigation.

    Purpose of the Study:

    • To investigate handedness-related differences in spatial visualization abilities.
    • To examine potential interactions between handedness, sex, and ethnicity on spatial cognition.
    • To explore differences in verbal abilities related to handedness.

    Main Methods:

    • Utilized data from a large-scale cognitive abilities study.

    Related Experiment Videos

  • Employed spatial factor scores from a cognitive test battery as a measure of spatial visualization.
  • Analyzed data considering handedness (strongly left-handed, strongly right-handed, ambidextrous), sex, and ethnicity.

    • Main Results:

    • A significant sex X handedness X ethnicity interaction was observed for spatial factor scores.
    • No significant handedness-related differences were found for verbal factor scores.
    • In all ethnic groups, strongly left-handed males outperformed strongly right-handed males in spatial tasks, while strongly left-handed females underperformed compared to strongly right-handed females.

    Conclusions:

    • Handedness-related differences in spatial visualization are complex and moderated by sex and ethnicity.
    • Previous negative findings may stem from overlooking the degree of handedness, ethnicity, and particularly sex.
    • Future research should consider these interacting factors for a more nuanced understanding of spatial cognition and handedness.