Junhan Cho is an Assistant Professor of Research in the Department of Preventive Medicine in the Keck School of Medicine of USC. He is the Director of Methodology and Statistics for the USC-Health, Emotion, & Addiction Laboratory, which conducts interdisciplinary research on substance use and related risk factors. With a strong interest to develop advanced research methodologies, Dr. Cho’s research aims to address how diverse social contexts and psychological vulnerabilities intersect to increase risk of substance use among youth and young adults. His studies incorporate both theoretical and methodological frameworks necessary to conducting longitudinal and prevention studies on various psychosocial processes associated with substance use. His current studies include: 1) developmental trajectories of use and co-use patterns of multiple tobacco products across adolescence and young adulthood; and 2) longitudinal risk and protective pathways linking early contextual stressors and psychological vulnerabilities to subsequent substance use behaviors.