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Direct linkGuimond, Fanny-Alexandra; Brendgen, Mara; Vitaro, Frank; Forget-Dubois, Nadine; Dionne, Ginette; Tremblay, Richard E.; Boivin, Michel – Developmental Psychology, 2014
This study used a genetically informed design to assess the effects of friends' and nonfriends' reticent and dominant behaviors on children's observed social reticence in a competitive situation. Potential gene-environment correlations (rGE) and gene-environment interactions (GxE) in the link between (a) friends' and…
Descriptors: Genetics, Environmental Influences, Prediction, Correlation
Brendgen, Mara; Vitaro, Frank; Barker, Edward D.; Girard, Alain; Dionne, Ginette; Tremblay, Richard E.; Boivin, Michel – Developmental Psychology, 2013
Using a genetically informed design, this study examined the additive and interactive effects of genetic risk, personal peer victimization experiences, and peer victimization experienced by others on children's aggression and depression symptoms. Of major interest was whether these effects varied depending on whether or not the victimized others…
Descriptors: Aggression, Genetics, Social Environment, Depression (Psychology)
Leblanc, Line; Swisher, Raymond; Vitaro, Frank; Tremblay, Richard E. – Journal of Research on Adolescence, 2008
A longitudinal and multilevel approach is used to examine the relationship between antisocial behavior during adolescence and high school social climate. The data are taken from a longitudinal study of 1,233 boys and girls who attended 217 public and private high schools. Students' disruptive behaviors were assessed yearly from 6 to 12 years of…
Descriptors: High Schools, Behavior Problems, Student Behavior, Antisocial Behavior
Gatti, Uberto; Tremblay, Richard E.; Vitaro, Frank – Journal of Child Psychology and Psychiatry, 2009
Background: The present study uses data from a community sample of 779 low-SES boys to investigate whether intervention by the juvenile justice system is determined, at least in part, by particular individual, familial and social conditions, and whether intervention by the juvenile courts during adolescence increases involvement in adult crime.…
Descriptors: Intervention, Delinquency, Juvenile Courts, Juvenile Justice
Brendgen, Mara; Lamarche, Veronique; Wanner, Brigitte; Vitaro, Frank – Developmental Psychology, 2010
The present study examined to what extent different types of friendship experiences (i.e., friendlessness, having depressed friends, and having nondepressed friends) are associated with early adolescents' longitudinal trajectories of depressed mood. On the basis of a sample of 201 youths (108 girls, 93 boys), we identified 3 distinct longitudinal…
Descriptors: Early Adolescents, Friendship, Adolescents, Depression (Psychology)
Pedersen, Sara; Vitaro, Frank; Barker, Edward D.; Borge, Anne I. H. – Child Development, 2007
This study used a sample of 551 children surveyed yearly from ages 6 to 13 to examine the longitudinal associations among early behavior, middle-childhood peer rejection and friendedness, and early-adolescent depressive symptoms, loneliness, and delinquency. The study tested a sequential mediation hypothesis in which (a) behavior problems in the…
Descriptors: Behavior Problems, Rejection (Psychology), Depression (Psychology), Delinquency
