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Stories about hands, brains, and minds

M Annett1

  • 1University of Leicester, Leicester, United Kingdom.

Brain and Language
|October 24, 1998
PubMed
Summary

The classification of handedness by Natsopoulos et al. is not comparable to Annett's due to differing sample compositions. Extreme right-handers in one study may represent a larger population segment than initially suggested.

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Area of Science:

  • Neuroscience
  • Psychology
  • Human Development

Background:

  • Handedness classification systems vary significantly.
  • Previous research by Natsopoulos et al. (1998) and Annett (1995) used different methodologies.
  • Comparisons between handedness studies require careful consideration of sample characteristics.

Purpose of the Study:

  • To evaluate the comparability of handedness classifications from different research groups.
  • To analyze the distribution of handedness within specific study samples.
  • To identify potential confounding factors in handedness research.

Main Methods:

  • Comparative analysis of handedness classification criteria.
  • Examination of sample demographics and selection criteria.
  • Statistical review of reported handedness distributions.

Main Results:

  • The Natsopoulos et al. (1998) classification is not directly comparable to Annett's (1995) due to sample differences.
  • Fifty percent of the Natsopoulos sample identified as left-handers, unlike Annett's unselected samples.
  • The 'extreme' right-hander category in Natsopoulos's study may represent a larger population proportion.

Conclusions:

  • Methodological variations in handedness research can lead to non-comparable findings.
  • The prevalence of specific handedness categories may be influenced by sample selection.
  • Further research is needed to control for factors like hand skill and reading ability in handedness studies.

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