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Related Experiment Videos

Predicting reading ability from handedness measures

R E Palmer1, M C Corballis

  • 1Department of Psychology, University of Auckland, New Zealand.

British Journal of Psychology (London, England : 1953)
|November 1, 1996
PubMed
Summary
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Children's hand skill and reading ability are linked, with left-hand skill differences potentially reflecting brain development. Absolute hand skill, not the difference between hands, better predicted reading performance in this study.

Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Genetics

Background:

  • Hand preference and skill differences are linked to cerebral asymmetry.
  • The 'right shift' (rs+) gene is hypothesized to influence manual asymmetry through right hemisphere cell pruning during development.
  • Annett's theory of balanced polymorphism suggests a heterozygotic advantage influencing the relationship between hand skill and reading.

Purpose of the Study:

  • To investigate the relationship between word reading, hand skill, and hand preference in children aged 11-13.
  • To explore the potential role of manual and cerebral asymmetry in reading ability.
  • To examine gender differences in the association between hand skill and reading.

Main Methods:

  • Assessed word reading, peg-moving hand skill, and hand preference in 203 children (11-13 years old).

Related Experiment Videos

  • Analyzed differences in skill between hands and absolute measures of hand skill.
  • Examined relationships between hand skill variables and reading performance, considering gender.

    • Main Results:

    • Differences in hand skill were primarily due to variations in left-hand skill, supporting theories of right hemisphere development.
    • Absolute hand skill measures, particularly right-hand skill in boys and left-hand skill in girls, predicted word reading more effectively than skill differences.
    • Weak evidence was found for Annett's theory of balanced polymorphism regarding a curvilinear relationship between differential hand skill and reading.

    Conclusions:

    • Manual asymmetry, linked to right hemisphere development, plays a role in children's reading ability.
    • Gender-specific patterns in hand skill and reading suggest differential hemispheric growth or environmental influences.
    • Absolute hand skill is a more significant predictor of reading than the difference between hand skills, especially in boys.