title: A model of contagion through competition in the aggressive behaviors of elementary school students.
abstract: This article extends the work of Kellam, Ling, Merisca, Brown and Ialongo (1998) by applying a mathematical model of competition between children to peer contagion in the aggressive behaviors of elementary school students. Nonlinearity in the relationship between group aggression and individual aggression at 2-year follow-up is present. Consistent with the findings of Kellam et al. (1998), hierarchical linear modeling indicates that the relationship is statistically significant for those students whose initial parental ratings of aggressive behavior were above the sample median. In the context of competition between students, the behavior of initially aggressive students may be negatively reinforced. Lowering aggression in the school environment may therefore be the most effective way to lower the level of these students' aggressive behavior.
authors.affiliation: College of Social Work, The Ohio State University, Columbus, Ohio 43210, USA. warren.193@osu.edu
authors.forename: Keith
authors.initials: K
authors.lastname: Warren
authors.forename: Susan
authors.initials: S
authors.lastname: Schoppelrey
authors.forename: D Paul
authors.initials: DP
authors.lastname: Moberg
authors.forename: Marilyn
authors.initials: M
authors.lastname: McDonald
mesh_terms: D000374:Aggression; D002653:Child Behavior Disorders / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology*; D002675:Child, Preschool; D003163:Competitive Behavior; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D015588:Observer Variation; D010379:Peer Group; D012919:Social Behavior; D012931:Social Environment