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The Resident-intruder Paradigm: A Standardized Test for Aggression, Violence and Social Stress
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Genetic and environmental stability differs in reactive and proactive aggression.

Catherine Tuvblad1, Adrian Raine, Mo Zheng

  • 1Department of Psychology, University of Southern California, Los Angeles, California 90089-1061, USA. Tuvblad@USC.EDU

Aggressive Behavior
|August 19, 2009
PubMed
Summary
This summary is machine-generated.

Genetic and environmental factors influence aggression differently. While proactive aggression continuity is genetic, reactive aggression stability involves genetics and environment. Both aggression types change due to nonshared environmental influences.

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Area of Science:

  • Developmental Psychology
  • Behavioral Genetics
  • Child Psychiatry

Background:

  • Aggression is a complex behavior with varying forms.
  • Understanding the developmental trajectory and etiological factors of aggression is crucial.

Purpose of the Study:

  • To investigate the stability and change in genetic and environmental influences on reactive and proactive aggression.
  • To differentiate the etiological underpinnings of these two aggression subtypes from childhood to early adolescence.

Main Methods:

  • Longitudinal twin study design.
  • Parental ratings of reactive and proactive aggression in childhood (ages 9-10) and early adolescence (ages 11-14).
  • Biometric analyses to estimate genetic and environmental contributions.

Main Results:

  • Stability of reactive aggression was influenced by genetic and nonshared environmental factors.
  • Continuity of proactive aggression was primarily mediated by genetic factors.
  • Changes in both aggression types were mainly attributed to nonshared environmental influences, with some new genetic variance emerging.

Conclusions:

  • Reactive and proactive aggression exhibit distinct genetic and environmental patterns of stability and change.
  • Findings support a differentiation between reactive and proactive aggression in their developmental etiology.
  • Nonshared environmental factors play a significant role in the changes observed in both aggression subtypes.