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Self-reported aggressiveness is not related to developmental instability.

Barış Özener1, Derya Atamtürk1, İzzet Duyar1

  • 1Department of Anthropology, Faculty of Literature, İstanbul University, İstanbul, Turkey.

American Journal of Human Biology : the Official Journal of the Human Biology Council
|April 21, 2015
PubMed
Summary

This study found no link between bodily symmetry and aggression in young Turkish adults. Aggressiveness does not appear to be a reliable indicator of developmental stability in this population.

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Area of Science:

  • Evolutionary Psychology
  • Human Behavior Studies
  • Biometry

Background:

  • Fluctuating asymmetry (FA) is a measure of developmental instability.
  • Previous research on FA and aggression has yielded inconsistent findings.
  • The relationship between physical symmetry and aggressive behavior requires further investigation.

Purpose of the Study:

  • To investigate the association between bodily symmetry and self-reported aggression.
  • To examine this relationship in a sample of healthy young adults in Turkey.

Main Methods:

  • 100 males and 102 females from Cumhuriyet University participated.
  • The Buss and Perry aggressiveness questionnaire was administered.
  • Four bilateral traits were measured to calculate a composite asymmetry index.

Main Results:

  • No significant relationship was found between composite asymmetry and any aggression component for males or females.
  • The findings indicate a lack of correlation between developmental instability and aggressive tendencies.

Conclusions:

  • The hypothesis that aggressiveness signals evolutionary fitness by correlating with developmental stability was not supported.
  • Results suggest that bodily symmetry is not a predictor of aggression in the studied Turkish population.