Müller, Christoph Michael Hofmann, Verena Fleischli, Janine Studer, Felix 2015 Early adolescence is a critical period during which classroom composition may affect behavioral development. This study investigated whether classmates' levels of aggression and delinquency influenced individual behavior during the first year of secondary school. At this point, students had just transitioned to a new classroom peer environment. A short-term longitudinal design with four measurement points distributed across the school year was applied. Data were collected from the anonymous self-reports of 825 7th graders. Longitudinal negative binomial multilevel analyses revealed that classmates’ antisocial behavior influenced pupils’ behavioral development (other peer influences were controlled). Furthermore, classroom behavioral heterogeneity did not moderate this effect. application/pdf https://folia.unifr.ch/global/documents/307884 https://folia.unifr.ch/documents/307884/files/Mueller_postprintjora2016.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1111/jora.12195 info:eu-repo/semantics/openAccess License undefined Journal of Research on Adolescence. - 2015, vol. 26, p. 345-359 Peer influence classroom composition behavioral problems antisocial behavior aggression delinquency secondary school info:eu-repo/classification/udc/376 Effects of Classroom Composition on the Development of Antisocial Behavior in Lower Secondary School http://purl.org/coar/resource_type/c_6501