My research focuses on evaluating and applying advanced statistical methods to behavioral and health data. My research falls into two broad categories: statistical research and applied research.

CV / scholar

Statistical research

Generalized linear model (GLiM)

GLiMs are a broad family of statistical models that extend linear regression analysis to a wider range of outcome variable distributions and error structures. I use simulations to explore the performance of these models. I am particularly interested in the statistical characteristics of counts outcome variables, especially in statistical mediation models.

  • Coxe, S. (2019, March). Counts and Frequencies in Psychological Research. At Blending Psychology and Methods: A Conference in Honor of Professor Leona Aiken. Tempe, AZ. March 22, 2019.
  • Aiken, L. S., Mistler, S. A., Coxe, S., and West, S. G. (2015). Analyzing Count Variables in Individuals and Groups: Single and Multilevel Models. Group Processes and Intergroup Relations, 18, 290-314. doi: 10.1177/1368430214556702
  • Coxe, S., Aiken, L. S., and West, S. G. (2013). Generalized linear models. In T. Little (Ed.), Oxford Handbook of Quantitative Methods, Volume 2. New York: Oxford University Press.
  • Coxe, S. (2010). Mediation analysis of Poisson distributed count outcomes: Standard estimates of the mediated effect are not equivalent. Presented at the 8th Annual Society of Multivariate Experimental Psychology Graduate Student Pre-conference. Atlanta, GA. September 30, 2010.
  • Coxe, S., West, S. G., and Aiken, L. S. (2009). The analysis of count data: A gentle introduction to Poisson regression and its alternatives. Journal of Personality Assessment, 91, 121-136.

Integrative data analysis (IDA)

I am joint co-PI on TIDAL, an integrative data analysis project funded by NIMH combining data from 4 separate psychosocial interventions for teens who have been diagnosed with ADHD. The combined dataset is publicly available here. Among the methodological challenges in this project were harmonization of measures of ADHD symptoms (DSM-IV versus DSM-5) and parent depression symptoms (various measures) using moderated nonlinear factor analysis.

Statistical graphics and R shiny

I am interested in graphics as an aid to interpreting and communicating statistical models. To this end, I have developed packages and shiny applications to calculate effect size for count regression models and to estimate confidence intervals for mediation models. shiny applications are interactive, web-based tools for statistical analysis and graphics.

Applied research

My applied research takes place largely within the Cancer Institute at Cedars-Sinai Medical Center, focusing on behavioral interventions within the Cancer Prevention and Control and the Health Equity groups. I also have 20 years of experience with clinical and psychosocial interventions in the Psychology departments at Arizona State University and Florida International University. I have also collaborated with faculty in the Center for Children and Families and the departments of Epidemiology, Social Work, and Biomedical Engineering at Florida International University. These studies often include complex longitudinal designs, non-normally distributed outcome variables, and extensive missing data.

  • Zhao, X., Coxe, S., Timmons, A., & Frazier, S. L. (2022). Mental Health Information-Seeking Online: A Google Trends Analysis of ADHD. Administration and Policy in Mental Health and Mental Health Services Research, 49, 357 - 373. https://doi.org/10.1007/s10488-021-01168-w
  • Sibley, M.H., Coxe, S.J., Page, T.P., Pelham, W.E., Yeguez, C.E., LaCount, P.A., & Barney, S. (2020). Four-Year Follow-up of High versus Low Intensity Summer Treatment for Adolescents with ADHD. Journal of Clinical Child and Adolescent Psychology.
  • Mukherjee, S., Coxe, S., Fennie, K., Madhivanan, P., Trepka, M. J. (2017). Stressful life event experiences of pregnant women in the United States: A latent class analysis. Women’s Health Issues, 27, 83 – 92.
  • Bagner, D. M., Coxe, S., Hungerford, G. M., Linares, D., Barroso, N., Hernandez, J., Rosa-Olivares, J. (2016). Behavioral parent training in infancy: A window of opportunity for high-risk families. Journal of Abnormal Child Psychology, 44, 901-912. doi: 10.1007/s10802-015-0089-5