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Barker, Edward D.; Tremblay, Richard E.; Nagin, Daniel S.; Vitaro, Frank; Lacourse, Eric – Journal of Child Psychology and Psychiatry, 2006
Background: Different developmental courses have been postulated for proactive and reactive aggression. Objective: Investigated the developmental course of proactive and reactive aggression in a large sample of adolescent boys from low socioeconomic areas. Method: A dual group-based joint trajectory method was used to identify distinct…
Descriptors: Group Membership, Developmental Stages, Males, Aggression
Gatti, Uberto; Tremblay, Richard E.; Vitaro, Frank; McDuff, Pierre – Journal of Child Psychology and Psychiatry, 2005
Background: Three different explanations have been given for the observation that adolescent gang members report more delinquent behaviour than their counterparts who do not affiliate with gangs: a) adolescents who commit more crimes join gangs (selection hypothesis); b) gang membership facilitates deviant behaviour (facilitation hypothesis); c)…
Descriptors: Foreign Countries, Predictor Variables, Hypothesis Testing, Behavior Theories