Dr. Robert Stephens
Technical Director

Robert Stephens has more than 20 years of experience as a research psychologist consulting on experimental design, developing measures, and performing statistical analysis on a variety of research and evaluation projects in a number of different content areas, with a particular emphasis on longitudinal data analysis. Dr. Stephens has considerable experience in modeling behavioral data from longitudinal studies using multiple regression, logistic regression, multilevel modeling (e.g., hierarchical linear modeling), and latent variable modeling techniques, including structural equation modeling, latent class analysis, growth curve modeling, and growth mixture modeling. He also provides consultation on instrument development and psychometrics.