Research Interests
Psychometrics
- Item Response Theory (IRT) & Response-time Modeling, Process Data Analysis, Fairness & Validity in Automated Scoring
Latent Variable Modeling
- Structural Equation Modeling (SEM), Latent Class Mediation Analysis
Applied Statistics
- Bayesian Analysis, Copula Models
Education
Statistics, MS, University of Illinois Urbana-Champaign
Psychology, MA, Sungkyunkwan University
Psychology and Statistics, BA, Sungkyunkwan University
Awards and Honors
Psychometric Society Travel Award (sponsored by Duolingo), IMPS 2025.
Graduate College Conference Presentation Award, 2025.
Hobson Fellowship, Department of Psychology, 2021-2025.
List of Teachers Ranked as Excellent by Students, Center for Innovation in Teaching & Learning, 2023.
Courses Taught
PSYC 490 Measurement & Test Develop Lab
PSYC 301 Psychological Statistics
PSYC 235 Intro to Statistics
External Links
Ida Lawrence Research Summer Internship at ETS (2024)
Recent Publications
Kwon, S., Zhang, S., Köhn, H. F., & Zhang, B. (2025). MCMC stopping rules in latent variable modelling. British Journal of Mathematical and Statistical Psychology, 78(1), 225-257.
Choi, J., Kwon, S., & Zhang, B. (2025). A Structural After Measurement Approach to Bifactor Predictive Models. Structural Equation Modeling: A Multidisciplinary Journal, 32(2), 173-186.