Guangjian Zhang is a quantitative psychologist. His research focuses on (1) exploratory factor analysis (EFA), structural equation modeling (SEM), and exploratory structural equation modeling (ESEM) with intensive longitudinal data, (2) EFA/SEM/ESEM with Likert (ordinal) data, (3) developing user-friendly software to broaden access to advanced statistical methods, and (4) collaborating with substantive researchers to address their questions using EFA, SEM, and ESEM.