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Hand preference in Turkish population.

Derya Deniz Elalmiş1, Uner Tan

  • 1Department of Physiology, Medical School, Cukurova University, Adana, Turkey.

The International Journal of Neuroscience
|April 13, 2005
PubMed
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This study on hand preference in Turkish families found more left-handed men than women and more right-handed women than men. Handedness trends show a decrease in right-handedness across generations, possibly due to reduced cultural pressure.

Area of Science:

  • Human genetics
  • Behavioral science
  • Anthropology

Background:

  • Hand preference, or handedness, is a complex human trait with observed sex differences and generational variations.
  • Cultural factors have historically influenced the expression of handedness, particularly discouraging left-hand use.

Purpose of the Study:

  • To investigate the distribution of hand preference in a large Turkish sample comprising siblings and their parents.
  • To examine potential sex-based differences in hand preference within families.
  • To explore generational changes in handedness patterns and their correlation with cultural influences.

Main Methods:

  • A large-scale survey utilizing self-report measures of hand preference.
  • Data collected from 22,461 individuals across Turkey, including siblings and their parents.

Related Experiment Videos

  • Statistical analysis to compare handedness distributions across sex and generational groups.

    • Main Results:

    • Significant sex differences observed in the sibling group: more right-handed women than men, and more left-handed men than women.
    • No significant sex difference in handedness was found among the parents.
    • Right-handedness was less prevalent in the sibling (newer) generation compared to the parent (older) generation; conversely, left-handedness was more prevalent in siblings.

    Conclusions:

    • A slight sex difference in hand preference may exist, with a small majority of men being left-handed and women right-handed.
    • A generational shift towards reduced right-handedness suggests that decreased cultural pressures against left-hand use are influencing handedness expression.
    • The findings highlight the interplay between genetic predispositions, sex, and socio-cultural factors in shaping human handedness.