Contact Information
725 S. Wright St.
M/C 374
Champaign, IL 61820
Research Areas
Research Interests
Psychometric models
Latent class models
Large-scale testing and assessment
Statistical computing
Education
PhD, Educational Psychology, University of Minnesota, 2006
BS, Economics, Bowling Green State University, 2001
Additional Campus Affiliations
Professor, Statistics
Professor, Beckman Institute for Advanced Science and Technology
Professor, Psychology
Professor, Educational Psychology
External Links
Recent Publications
Culpepper, S. A., & Park, T. (2026). A Gibbs sampler for the LKJ Prior on correlation matrices. Statistics and Computing, 36(3), Article 127. https://doi.org/10.1007/s11222-026-10879-9
Le, T., Culpepper, S. A., & Douglas, J. (2026). Longitudinal Designs for Diagnostic Models: Identification and Estimation. Psychometrika. Advance online publication. https://doi.org/10.1017/psy.2026.10128
Wayman, E. A., Culpepper, S. A., Douglas, J., & Bowers, J. (2026). A Restricted Latent Class Hidden Markov Model for Polytomous Responses, Polytomous Attributes, and Covariates: Identifiability and Application. Journal of Educational and Behavioral Statistics. Advance online publication. https://doi.org/10.3102/10769986251415569
Williams, L. J., Castille, C., & Culpepper, S. (2026). In defense of the RMSEA-P for latent variable model evaluation: A failed reproducibility study of Lanceet al.(2016). Journal of Management Scientific Reports, 4(1), 102-127. https://doi.org/10.1177/27550311251404933
Bowers, J., & Culpepper, S. (2025). Domain Latent Class Models. Bayesian Analysis, 20(4), 1429-1456. https://doi.org/10.1214/24-BA1433