Do Classes of Polysubstance Use in Adolescence Differentiate Growth in Substances Used in the Transition to Young Adulthood? Gabriel J. Merrin, Bonnie J. Leadbeater April 2018 PDF Cite DOI Do Classes of Polysubstance Use in Adolescence Differentiate Growth in Substances Used in the Transition to Young Adulthood? Gabriel J. Merrin, Bonnie J. Leadbeater April 2018 PDF Cite DOI Polysubstance use cigarette alcohol marijuana illicit drugs latent class analysis latent growth model Gabriel J. Merrin Assistant Professor My primary area of research examines the development and stability of identity-based harassment, aggression, substance use, victimization, and other problem behaviors across adolescence and in the transition to young adulthood. Related Transitions in the Use of Multiple Substances from Adolescence to Young Adulthood