The Relation Between Changes in Marijuana Smoking Trajectories and Changes

Gang Lee, University of Texas at El Paso

Latent curve analysis was used to assess the impact of changes in social learning of differential association, differential reinforcement, and definitions on marijuana smoking trajectories in adolescence and young adults. Four years of data were obtained from a sample of adolescents (N=1,10-2) drawn from the National Youth Survey (1976, 1978, 1980, 1983). Marijuana use and social learning variables were assessed once per year and covariates included family income, gender, ethnicity and age. Latent curve models indicated that regardless of the time point at which an individual's differential association, differential reinforcement and definition changed, there was corresponding added increment to the natual marijuana smoking trajectory. Changes in social learning are associated with an accelerated increase in the developmental growth trajectory of marijuana use over time.

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Updated 05/20/2006