Members of the Methodology Research Core

Michael Berbaum, PhD, Director
Social psychologist with research interests in applications of ordinal regression techniques to diagnostic radiology and to studies of pain control. Also interested in the resolution of statistical complications that arise from clustering, missing data, and sample selection in health studies.

Richard T. Campbell, PhD
Professor of biostatistics and sociology with research interests in aging and health; racial, ethnic and socioeconomic disparities in health; methodology of longitudinal research; statistical analysis of developmental data; structural equation modeling; and analysis of complex survey data.

Young-Ku Choi, PhD
Biostatistician with interests in longitudinal/functional and temporal/spatial data modeling, biostatistical and epidemiological modeling and application, Bayesian nonparametric and semiparametric regression modeling and predictive inference, diagnostic test assignment and evaluation methodology, survival analysis.

Donald Hedeker, PhD
Biostatistician with expertise in random effects models, especially those involving categorical data, and longitudinal data analysis.