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Related Experiment Videos

Mathematical ability and lateral asymmetry

M Annett, D Kilshaw

    Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
    |December 1, 1982
    PubMed
    Summary
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    Special mathematical ability is linked to less strong right-hand preference. This suggests extreme right-handedness may hinder mathematical thinking, potentially due to genetic factors influencing brain lateralization.

    Area of Science:

    • Neuroscience
    • Psychology
    • Genetics

    Background:

    • Handedness and brain lateralization are complex traits.
    • The right shift (RS) theory proposes genetic influences on handedness.
    • Mathematical ability involves integrating information processed by different brain hemispheres.

    Purpose of the Study:

    • To investigate the association between mathematical ability and handedness.
    • To explore the relationship between mathematical skill and bias towards right-handedness.
    • To examine these associations in students and mathematics teachers.

    Main Methods:

    • Comparative analysis of handedness in mathematics students and teachers versus control groups.
    • Statistical comparisons of dextral preference and skill across groups.

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  • Analysis in relation to the right shift (RS) theory of handedness.

    • Main Results:

    • Mathematics students and teachers showed a reduced bias towards right-handedness compared to controls.
    • These differences were statistically significant and more pronounced in males.
    • Findings suggest an increased incidence of left-handedness or reduced right-handedness bias in mathematicians.

    Conclusions:

    • Reduced right-hand bias in mathematicians may not stem from an advantage of left-handedness.
    • Extreme right-handedness, possibly linked to specific genotypes (rs++), might be disadvantageous for mathematical thinking.
    • Mathematical thinking requires hemispheric coordination, which could be impeded by strong left-hemisphere specialization potentially influenced by genetic factors.