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van Lier, Pol A. C.; Vitaro, Frank; Barker, Edward D.; Brendgen, Mara; Tremblay, Richard E.; Boivin, Michel – Child Development, 2012
This study explored whether early elementary school aged children's externalizing problems impede academic functioning and foster negative social experiences such as peer victimization, thereby making these children vulnerable for developing internalizing problems and possibly increasing their externalizing problems. It also explored whether early…
Descriptors: Academic Achievement, Underachievement, Foreign Countries, Victims
Vitaro, Frank; Boivin, Michel; Brendgen, Mara; Girard, Alain; Dionne, Ginette – Journal of Educational Psychology, 2012
The goal of this study was to examine how different types of social experiences in kindergarten relate to Grade 1 academic achievement, while controlling for possible genetic and shared environmental influences through the use of the monozygotic (MZ) twin difference method. Social experiences in kindergarten included relationship quality with the…
Descriptors: Academic Achievement, Parent Child Relationship, Peer Groups, Rejection (Psychology)
Brendgen, Mara; Vitaro, Frank; Boivin, Michel; Girard, Alain; Bukowski, William M.; Dionne, Ginette; Tremblay, Richard E.; Perusse, Daniel – Journal of Child Psychology and Psychiatry, 2009
Background: Genetic risk for depressive behavior may increase the likelihood of exposure to environmental stressors (gene-environment correlation, rGE). By the same token, exposure to environmental stressors may moderate the effect of genes on depressive behavior (gene-environment interaction, GxE). Relating these processes to a peer-related…
Descriptors: Twins, Peer Groups, Genetics, Peer Acceptance
Lamarche, Veronique; Brendgen, Mara; Boivin, Michel; Vitaro, Frank; Dionne, Ginette; Perusse, Daniel – Journal of Abnormal Child Psychology, 2007
This study examined (a) the predictive link between peer victimization and children's reactive and proactive aggression, and (b) the potential moderating effect of reciprocal friends' reactive and proactive aggression in this context. The study also examined whether these potential moderating effects of friends' characteristics were stronger with…
Descriptors: Friendship, Aggression, Children, Comparative Analysis

Brendgen, Mara; Vitaro, Frank; Turgeon, Lyse; Poulin, Francois; Wanner, Brigitte – Journal of Abnormal Child Psychology, 2004
This study examined (a) the links between children's overly positive perceptions about the relations with the peer group and with their best friend to subsequent behavioral, emotional, and social adjustment, and (b) whether these links are moderated by children's aggression. Using a short-term longitudinal design, the study was based on a sample…
Descriptors: Peer Groups, Interpersonal Competence, Social Adjustment, Friendship

Brendgen, Mara; Wanner, Brigitte; Morin, Alexandre J. S.; Vitaro, Frank – Journal of Abnormal Child Psychology, 2005
The present study examined (a) whether groups of children can be empirically identified with distinct longitudinal profiles of depressed mood from late childhood through early adolescence, (b) to what extent these different longitudinal depression profiles are predicted by problematic relations with parents, same-sex peers, and other-sex peers,…
Descriptors: Early Adolescents, Profiles, Personality Traits, Depression (Psychology)
Brendgen, Mara; Wanner, Brigitte; Vitaro, Frank; Bukowski, William M.; Tremblay, Richard E. – Journal of Educational Psychology, 2007
Using a prospective design spanning 17 years, the authors studied in a sample of 231 boys and girls the predictive links of verbal abuse by the teacher during childhood to high-school graduation and behavioral and emotional problems in young adulthood, as well as the putative mediating role of individuals' generalized and domain-specific…
Descriptors: Peer Groups, Probability, Females, Emotional Adjustment