Multilevel correlates of childhood physical aggression and prosocial behavior.

The study identified independent individual, family, and neighborhood correlates of children's physical aggression and prosocial behavior. Participants were 2,745 2-11-year olds nested in 1,982 families, which were themselves nested in 96 Canadian neighborhoods. Hierarchical linear modeling showed that the total variation explained by the three-level model was 28.03% for physical aggression and 17.57% for prosocial behavior. For both childhood behaviors, approximately 66% of this explained variance was between individuals and up to 30% was between families. The smallest amount of observed variation was between neighborhoods. Significant individual-level predictors common to both childhood behaviors were child's sex and maternal hostility toward the target child. Specifically, boys had more mother-reported physical aggression and less prosocial behavior. Children who experienced greater-than-average maternal hostility (compared to siblings) were more physically aggressive and less prosocial. At the family level, significant common predictors were mother depressed mood and punitive parenting. Children had higher levels of physical aggression and lower levels of prosocial behavior in families where mothers had greater depressed mood and used more punitive parenting practices. At the neighborhood level, greater perceived problems and lower poverty level were associated with higher levels of physical aggression. Results are discussed with reference to past and future studies of multilevel effects on children's socialization.

Response perseveration in adolescent boys with stable and unstable histories of physical aggression: the role of underlying processes.

BACKGROUND: It was unclear whether response perseveration and underlying processes, often related to antisocial externalizing disorders, were also related to histories of physical aggression. METHOD: Boys of age 13 years were selected on the basis of childhood histories of physical aggression: stable, unstable, and non-aggressive. Performance on a Card Playing Task provided a perseveration index. RESULTS: Physical aggression, regardless of history, predicted perseveration in adolescence. However, qualitative differences revealed that Neuroticism increased the risk for perseveration only in the unstable aggressive group relative to the other groups. Perseveration in the stable aggressive group maybe related to a more fundamental information-processing deficit. CONCLUSION: The identification of these processes has implications for developmental theories of physical aggression; they may help discriminate those children who show early physical aggression and who will remain aggressive from those who will only show occasional physical aggression during later childhood.

Obstetrical complications and violent delinquency: testing two developmental pathways.

This study focused on the interaction between specific obstetrical complications and early family adversity in predicting violent behavior during childhood and adolescence, in a sample of 849 boys from low socioeconomic areas of Montreal, Canada. Obstetrical complication data from medical records were used to create three scales using a nonlinear principal component analysis followed by rotation. Family adversity and teacher-rated physical aggression were assessed when the boys were in kindergarten and self-reports of delinquency were collected when they were 17. Elevated scores on the Deadly Risk Situation scale of obstetrical complications (preeclampsia, umbilical cord prolapse, and induced labor) increased the risk of being violent at both 6 and 17 years of age, only among boys who grew up in high adverse familial environments. Moreover, this interaction partly accounted for the continuity between violence in childhood and adolescence. Interventions for young pregnant women from deprived environments and their babies are discussed in light of these results.