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Direct linkVitaro, Frank; Brendgen, Mara; Girard, Alain; Dionne, Ginette; Tremblay, Richard E.; Boivin, Michel – International Journal of Behavioral Development, 2016
Exposure to deviant friends has been found to be a powerful source of influence on children's and adolescents' aggressive behavior. However, the contribution of deviant friends may have been overestimated because of a possible non-accounted gene-environment correlation (rGE). In this study, we used a cross-lagged design to test whether friends'…
Descriptors: Adolescents, Friendship, Aggression, Genetics
van Lier, Pol A. C.; Vitaro, Frank; Barker, Edward D.; Koot, Hans M.; Tremblay, Richard E. – Journal of Abnormal Child Psychology, 2009
Differences in developmental trajectories of physical violence, vandalism, theft, and alcohol-drug use from ages 10 to 15 were studied. For females and for males, three trajectories of theft and of alcohol-drug use increased from 10 years to 15 years, while only the high trajectory of vandalism increased from ten to 14. All trajectories of…
Descriptors: Violence, Vandalism, Females, Drug Abuse
Otten, Roy; Wanner, Brigitte; Vitaro, Frank; Engels, Rutger C. M. E. – Journal of Clinical Child and Adolescent Psychology, 2008
This study examined the role of friends' attitudes in adolescent smoking (N = 203). Growth mixture modeling was used to identify three trajectories of smoking behavior from ages 12 to 14 years: a "low-rate" group, an "increasing-rate" group, and a "high-rate" group. Adolescents' own and their friends' attitudes at age…
Descriptors: Smoking, Preadolescents, Early Adolescents, Student Attitudes
Nantel-Vivier, Amelie; Kokko, Katja; Caprara, Gian Vittorio; Pastorelli, Concetta; Gerbino, Maria Grazia; Paciello, Marinella; Cote, Sylvana; Pihl, Robert O.; Vitaro, Frank; Tremblay, Richard E. – Journal of Child Psychology and Psychiatry, 2009
Objectives: To longitudinally describe prosocial behaviour development from childhood to adolescence, using multiple informants within Canadian and Italian samples. Method: Participants in Study 1 were 1037 boys from low socioeconomic status (SES) areas in Montreal, Canada, for whom yearly teacher and mother reports were obtained between the ages…
Descriptors: Cross Cultural Studies, Mothers, Children, Foreign Countries
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
Veronneau, Marie-Helene; Vitaro, Frank; Pedersen, Sara; Tremblay, Richard E. – Journal of Educational Psychology, 2008
This 17-year longitudinal study tested whether low peer-perceived acceptance and association with aggressive-disruptive friends during preadolescence predicted students' failure to graduate from secondary school. Participants were 997 Caucasian, French-speaking boys from low-socioeconomic status, urban neighborhoods. The boys were recruited in…
Descriptors: Graduation Rate, High School Graduates, Longitudinal Studies, Peer Influence
