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Gene-environment processes linking aggression, peer victimization, and the teacher-child relationship
Mara Brendgen1, Michel Boivin, Ginette Dionne
1Department of Psychology, University of Quebec at Montreal, Montréal, QC, Canada. brendgen.mara@uqam.ca
Child Development
|October 27, 2011
Summary
Genetic factors influence childhood aggression. Gene-environment interactions and correlations show that children predisposed to aggression face more peer victimization, but positive teacher relationships can reduce aggression expression.
Area of Science:
- Developmental Psychology
- Behavioral Genetics
- Child Psychiatry
Background:
- Aggressive behavior in middle childhood has a significant genetic component.
- Previous research often overlooks complex gene-environment interplay in aggression etiology.
- Gene-environment interactions (G × E) and gene-environment correlations (rGE) are crucial for a comprehensive understanding.
Purpose of the Study:
- To investigate gene-environment interactions (G × E) and gene-environment correlations (rGE) in the development of aggression.
- To examine the roles of peer victimization and teacher-child relationships in mediating these genetic influences.
- To simultaneously test G × E and rGE models for aggression in a school context.
Main Methods:
- Utilized a twin study design with 124 monozygotic (MZ) and 93 dizygotic (DZ) twin pairs.
- Data collected from twins in Grade 1 (mean age = 84.7 months).
- Employed statistical models to assess genetic predispositions, peer victimization, teacher-child relationships, and aggressive behavior.
Main Results:
- Evidence supports gene-environment correlations (rGE): children with a genetic predisposition for aggression showed increased risk for peer victimization.
- Findings align with gene-environment interactions (G × E): a positive teacher-child relationship mitigated the genetically influenced expression of aggression.
- Both rGE and G × E processes contribute to the etiology of aggression.
Conclusions:
- Childhood aggression is influenced by both genetic predispositions and environmental factors.
- Peer victimization may be partly explained by genetic factors linked to aggression (rGE).
- Supportive teacher relationships can buffer genetic influences on aggression, highlighting the importance of school environment (G × E).
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