Developmental Trajectories of Delinquency Seriousness and Their Predictors: A Cross-Site Study

Eric Lacourse, Universite de Montreal
Rolf Loeber, University of Pittsburgh
Richard E. Tremblay, University of Montreal

ABSTRACT
This study explores the developmental aspects or delinquency seriousness in two sites: Montreal and Pittsburgh. We used a semi-parametric mixture model to identify developmental trajectories of delinquency seriousness from age 11 through 17 based on self-report data. Following this analysis, we investigated parental and child predictors at ages 6 and 7 that can discriminate chronic serious offenders from adoelscent onset and non-offenders. Examples of parental predictors are mother and father criminality, teenage motherhood, and SES. Physical aggression, opposition and hyperactivity are examples of child predictors. Differences and similarities are discused from a cross-cultural perspective.

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Updated 05/20/2006