Dr. Sayer is Associate Professor of Psychology at University of Massachusetts – Amherst. She is a developmental psychologist with an extensive background in both child and adolescent development and quantitative methodology. She specializes in new statistical strategies for studying individual development over time. These include hierarchical linear models and structural equation models. Her current focus is on embedding measurement indicators in growth curve models using both multilevel and covariance structure analysis. She is also interested in models that capture the interdependencies in data obtained from couples and other dyads.