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Hand preference as related to development and behavior in infancy.

E Tirosh1, M Stein, J Harel

  • 1Hannah Khoushy Child Development Center, Bnai Zion Medical Center, Bruce Rappaport Faculty of Medicine, Technion Israel Institute of Technology, Haifa. etirosh@tx.technion

Perceptual and Motor Skills
|December 22, 1999
PubMed
Summary

Infant hand preference at 9 months showed a notable number of ambidextrous babies, differing from older children. No clear link was found between early hand preference and developmental milestones in this study.

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Area of Science:

  • Developmental Psychology
  • Neuroscience
  • Pediatrics

Background:

  • Understanding infant development includes tracking the emergence of behavioral patterns like hand preference.
  • Existing research on hand preference is primarily based on older children and adults, with limited data on early infancy.

Purpose of the Study:

  • To investigate the developmental patterns of hand preference in healthy 9-month-old infants.
  • To explore the relationship between early hand preference and developmental attainments.
  • To compare infant hand preference distribution with that of older populations.

Main Methods:

  • Assessed developmental and behavioral patterns in 55 healthy infants at 9 months of age.
  • Evaluated hand preference in the same infants at 20 months of age.

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  • Analyzed the distribution of right-handed, left-handed, and ambidextrous preferences.

    • Main Results:

    • The study observed 12 right-handed, 11 left-handed, and 23 ambidextrous infants at 20 months.
    • This distribution showed a higher prevalence of left-handedness and ambidexterity compared to older children.
    • No significant correlation was found between hand preference and developmental achievements in the assessed infants.

    Conclusions:

    • Infant hand preference distribution may differ from that of older children, with a potential shift towards left-handedness and ambidexterity.
    • Ambidexterity in infancy might represent a phase within the broader spectrum of hand preference development.
    • Further research with larger sample sizes is recommended to clarify developmental behavioral patterns and hand preference in infancy.