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Related Experiment Videos

Life-span age trends in laterality

C Porac, S Coren, P Duncan

    Journal of Gerontology
    |September 1, 1980
    PubMed
    Summary
    This summary is machine-generated.

    Human handedness, footedness, eyedness, and earedness show age-related shifts. Preference for right-sidedness increases with age for hands, feet, and eyes, while left-sidedness increases for ears.

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    Area of Science:

    • Human laterality
    • Neuroscience
    • Developmental Psychology

    Background:

    • Human laterality, encompassing hand, foot, eye, and ear preference, is a complex trait.
    • Understanding age-related changes in laterality is crucial for developmental and neurological studies.

    Purpose of the Study:

    • To investigate age and sex differences in hand, foot, eye, and ear laterality.
    • To explore potential causal mechanisms underlying observed laterality trends.

    Main Methods:

    • Assessed laterality in a large sample of 1964 individuals across a wide age range (8-100 years).
    • Analyzed age trends and sex differences in preference for hand, foot, eye, and ear.

    Main Results:

    • Significant age trends were observed: hand, foot, and eye preference shifted towards right-sidedness with age.

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  • Ear preference showed a trend towards left-sidedness with increasing age.
  • Sex differences were noted in foot, eye, and ear preference, independent of age.

    • Conclusions:

    • Laterality is dynamic and changes across the human lifespan.
    • Current causal models do not fully account for the observed age-related shifts in laterality.
    • Future research should consider a multifactorial approach, including individual differences, to understand human sidedness.