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Influences on Boys' Marijuana Use in High School: A Two‐Part Random Intercept Growth Model
Author(s) -
Washburn Isaac J.,
Capaldi Deborah M.
Publication year - 2014
Publication title -
journal of research on adolescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.342
H-Index - 95
eISSN - 1532-7795
pISSN - 1050-8392
DOI - 10.1111/jora.12030
Subject(s) - psychology , substance use , growth model , baseline (sea) , clinical psychology , developmental psychology , oceanography , economics , microeconomics , geology
This study examined differences in predictors of marijuana use versus quantity of marijuana use across the high school years, using annual assessments from the O regon Youth Study ( OYS ) and a two‐part model for semicontinuous data. The OYS is a community sample of at‐risk boys followed from age 10 years. To capture dynamic prediction effects, change scores of predictors, as well as baseline scores, were included. Baseline predictors predominantly showed associations with the intercepts but not with the slopes of growth models. Change scores for parental monitoring, peer substance use, and antisocial behavior and deviant associations were associated with both parts of the model. Findings highlight the importance of looking at marijuana use compared with the quantity of marijuana use.