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Physical aggression during early childhood: trajectories and predictors
Richard E Tremblay1, Daniel S Nagin, Jean R Séguin
1Research Unit on Children's Psychosocial Maladjustment, University of Montreal, Montreal, Quebec, Canada. grip@umontreal.ca
Pediatrics
|July 3, 2004
Summary
Early childhood physical aggression trajectories reveal that most children learn to regulate behavior, but a high-risk group exhibits persistent aggression. Key predictors include maternal antisocial behavior, early childbearing, and family dysfunction, suggesting targeted early interventions are crucial for preventing later violence.
Area of Science:
- Developmental Psychology
- Public Health
- Criminology
Background:
- Childhood physical aggression is a significant public health concern, predicting future mental health issues, substance abuse, and violent behavior in both victims and perpetrators.
- Early physical aggression, observed in most infants by 17 months, can persist and escalate, necessitating an understanding of its developmental trajectories and origins.
- Identifying early risk factors for persistent physical aggression is crucial for developing effective preventive interventions against later violence.
Purpose of the Study:
- To identify distinct developmental trajectories of physical aggression in early childhood.
- To pinpoint family and child characteristics present before 5 months of age that predict high levels of physical aggression from 17 to 42 months.
Main Methods:
- Recruited 572 families with a 5-month-old infant for a longitudinal study.
- Collected data on physical aggression frequency from mothers at 17, 30, and 42 months postpartum.
- Utilized semiparametric mixture models to identify aggression trajectories and multivariate logit regression to determine predictive factors.
Main Results:
- Identified three trajectories: low/no aggression (28%), rising modest aggression (58%), and rising high aggression (14%).
- Predictors for the high aggression trajectory included young siblings, maternal history of antisocial behavior, early childbearing, low income, and smoking during pregnancy.
- Maternal coercive parenting and family dysfunction at 5 months also predicted high aggression; a combination of maternal antisocial behavior and early childbearing yielded the highest odds ratio (10.9).
Conclusions:
- While most children regulate physical aggression by preschool, a subset does not, increasing their risk for adolescent and adult violence.
- Maternal factors (antisocial behavior, early childbearing, smoking), socioeconomic status (low income), and family environment (dysfunction) are key early risk indicators.
- Interventions targeting high-risk infants and families during pregnancy or early infancy, focusing on parental self-control and infant socialization, may be more effective than later interventions.