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Early language and intelligence development and their relationship to future criminal behavior

H Stattin1, I Klackenberg-Larsson

  • 1Department of Psychology, University of Stockholm, Sweden.

Journal of Abnormal Psychology
|August 1, 1993
PubMed
Summary

Lower childhood intelligence and delayed language development in boys are linked to increased registered criminality. Early language assessment can predict future criminal behavior, highlighting the importance of early intervention.

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Area of Science:

  • Developmental Psychology
  • Criminology
  • Child Development

Background:

  • Investigated the link between intelligence, language development, and registered criminality in boys.
  • Utilized longitudinal data from a birth-to-maturity study.

Purpose of the Study:

  • To examine the relationship between intelligence, early language development, and later criminality in males.
  • To test the hypothesis that early language delays predict future criminal behavior.

Main Methods:

  • Assessed intelligence regularly from ages 3 to 17 in 122 boys.
  • Evaluated early language development using the Brunet-Lézine test at 6, 18, and 24 months.
  • Collected data on verbal behavior and speech through psychological ratings and maternal reports (ages 3-5).

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Main Results:

  • Found significant negative correlations between intelligence and criminality across multiple ages, starting from age 3.
  • Confirmed a negative association between early language development (at 6, 18, 24 months) and registered criminality.
  • Psychologist ratings and maternal reports further supported the link between language skills and reduced criminality.

Conclusions:

  • Early language development is a significant predictor of later criminality in boys.
  • Language deficits in early childhood may contribute to the development of criminal behavior.
  • Interventions targeting early language development could potentially mitigate future criminality.