Members of the Methodology Research Core

Michael L. Berbaum, PhD

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 emeritus 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.

Oksana Pugach, PhD

Biostatistician with expertise in bivariate mixed-effects location-scale models for longitudinal studies and multilevel mixed-effects regression models for survey data.