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Related Experiment Videos

Handedness patterns in deaf persons.

J D Bonvillian, M D Orlansky, J B Garland

    Brain and Cognition
    |April 1, 1982
    PubMed
    Summary

    Deaf students show higher left-handedness rates than hearing students. This suggests language acquisition timing, not auditory experience, influences handedness development in deaf individuals.

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    Area of Science:

    • Neuroscience
    • Developmental Psychology
    • Linguistics

    Background:

    • Handedness, the preference for using one hand over the other, is a complex trait influenced by various factors.
    • Previous research has explored the relationship between hearing status and handedness, with some studies suggesting differences.

    Purpose of the Study:

    • To investigate handedness patterns in deaf versus hearing student populations.
    • To explore potential correlations between handedness, family history of deafness, and age of sign language acquisition in deaf individuals.

    Main Methods:

    • Comparison of handedness data (questionnaire and performance tests) between deaf and hearing college students.
    • Analysis of family history of deafness and age of sign language introduction among deaf participants.

    Main Results:

    • Both deaf and hearing groups predominantly exhibited right-handedness.
    • A significantly higher incidence of left-handedness was observed in the deaf student group compared to the hearing group.
    • Left-handed deaf students were less likely to have deaf relatives and had later sign language acquisition.

    Conclusions:

    • The age of language acquisition appears to be a significant factor in the development of handedness patterns.
    • Auditory processing experience is unlikely to be the primary driver of handedness differences observed in deaf individuals.

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