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Genetic and environmental influences on intimate partner aggression: a preliminary study
Denise A Hines1, Kimberly J Saudino
1Family Research Laboratory, University of New Hampshire, Durham, NH 03824, USA. Denise.Hines@unh.edu
Violence and Victims
|July 13, 2005
Summary
Genetic factors, not just environmental influences, significantly contribute to intimate partner aggression. This suggests a genetic predisposition for involvement in aggressive relationships, challenging existing social learning theories.
Area of Science:
- Behavioral Genetics
- Psychology
- Family Studies
Background:
- Social learning theory suggests aggression is learned environmentally through observation and reinforcement.
- Familial resemblance in intimate aggression may stem from genetic factors, not solely environmental influences.
Purpose of the Study:
- To investigate the genetic and environmental contributions to intimate aggression using a twin design.
- To examine the genetic overlap between using and receiving intimate partner aggression.
Main Methods:
- Twin study design with 134 monozygotic and 41 dizygotic twin pairs.
- Model-fitting analyses to assess genetic and environmental influences on intimate aggression.
- Multivariate model-fitting to explore shared genetic factors in aggression.
Main Results:
- Shared genes significantly explained familial resemblance in psychological and physical intimate partner aggression.
- Unique environmental factors accounted for the remaining variance in intimate aggression.
- Most genetic influences for using aggression were shared with genetic influences for receiving aggression.
Conclusions:
- Genetic factors play a substantial role in intimate partner aggression, challenging purely environmental explanations.
- A genetic predisposition may influence an individual's likelihood of being involved in aggressive relationships.
- Findings highlight the complex interplay of genetic and environmental factors in intimate aggression.