My primary research interest is in examining the roles of mental health and other psychosocial variables in relation to substance abuse and other adverse health outcomes. The goal of my research is to investigate longitudinal relationships between mental health and substance abuse to better prevent and treat co-occurring disorders while also addressing the issue of health disparities across urban and rural communities. My research also focuses on design and analyses of psychological and health data in longitudinal studies and clinical trials, with a particular emphasis on latent growth modeling and tests of measurement invariance over time and across populations. I regularly collaborate with Drs. John Roll, Donelle Howell, Sterling McPherson, and Jennifer Cameron as well as other members of the Program of Excellence in the Addictions (PEA), and the Program of Excellence in Rural Mental Health and Substance Abuse Treatment (RMHSAT).