Research on sex differences in antisocial behaviour may shed light on the causes of childhood antisocial behaviour. Using a longitudinal design, we tested whether there were sex differences in the amount of harsh discipline children received or in the effect of harsh discipline and whether this accounted for sex differences in later conduct…

This study aimed to support the theory of popularity contagion, which posits that popularity spreads among friends spontaneously and regardless of behavioral changes. Peer nominations of status and behavior were collected annually between 6th and 12th grades from a total of 1062 adolescents. Longitudinal hypotheses were mostly supported using path…

This study examined antisocial and prosocial behavior of N = 439 adolescent athletes between 14 and 17 years of age (67 teams). Multi-level analyses showed that team membership explained 20 and 13 percent of the variance in antisocial and prosocial behavior in the sports context, respectively. The team effects suggest that aggregating antisocial…

This study examined the contribution of maternal childhood histories of aggression and social withdrawal to the prediction of mother-child social problem solving in the next generation. Fifty-seven women (M = 37.32 years), previously rated (on a version of the pupil evaluation inventory) by their peers during childhood on measures of aggression…

The goal of this study is twofold: (1) to assess brain anatomical differences between children meeting diagnostic criteria for oppositional defiant disorder (ODD) and healthy controls, and (2) to investigate whether morphological brain characteristics associated with ODD differ in boys and girls. Eight-year-old participants (N = 38) were scanned…

Based on the notion that one of the motives underlying children's antisocial behavior is their need to belong to particular peers, it was examined how each of four types of bullying-related behavior would be related to the acceptance that 10 to 13-year-old children desired and received from same- and other-sex children with different…

This longitudinal study examined the covariation between parents' use of control and solicitation, youth willingness to self-disclose to parents, and youth antisocial behavior from ages 13 to 14. Structural equation analyses were conducted on a combined sample of Italian (N = 152) and French Canadian (N = 151) adolescents. Analyses tested for…

In order to assess the effects of displacement and exposure to violence on children's moral reasoning, Colombian children exposed to minimal violence (non-displaced or low risk; N = 99) and to extreme violence (displaced or high risk; N = 94), evenly divided by gender at 6, 9, and 12 years of age, were interviewed regarding their evaluation of…

Moderators of the well-established association between status and overt and relational aggression were tested in a four-year longitudinal sample (N = 358) of high school students. Self-perceptions of popularity were found to moderate the link between actual peer-perceived popularity and aggression, with adolescents who were both popular and aware…

The moderating effect of maternal behavior in the relations between social reticence and shyness in preschool and subsequent social withdrawal was investigated. Eighty children (47 females) were judged for degree of social reticence during play with unfamiliar peers at the age of four and mothers completed the Colorado child temperament inventory…

A minimal group study examined the effect of peer group norms on children's direct and indirect bullying intentions. Prior to an inter-group drawing competition, children (N = 85) aged seven and nine years were assigned to a group that had a norm of out-group dislike or out-group liking. Results indicated that, regardless of group norms, the…

We examined the contribution of relational aggression in adolescents' peer and dating relationships to their psychological and behavioral adjustment. In the Fall and again four months later, 1279 (646 female) grade 9 students reported on relational aggression perpetration and victimization in their romantic and peer relationships,…

Studies reporting sociometric assessments based on nominations have been characterized by important methodological inconsistencies when conducted in the middle school context. The purpose of this study was to examine (1) the possibility of a response bias when participants are provided with a long roster sorted alphabetically, (2) the impact of…

This short-term longitudinal study examined changes over time in social competence with peers as a function of child and classroom characteristics. One hundred and seventy ethnically diverse low-income children, all new to their peer groups, entered childcare classrooms with heterogeneous entry policies and ethnic/racial compositions. We observed…

The purpose of this study was to test direct, additive, and mediation models involving family, neighborhood, and peer factors in relation to emerging antisocial behavior and social skills. Neighborhood danger, maternal depressive symptoms, and supportive parenting were assessed in early childhood. Peer group acceptance was measured in middle…