Stephen W. Raudenbush, Ed.D, is Professor, School of Education and Survey Research Center; and (by courtesy) Departments of Statistics and Sociology at The University of Michigan. Dr. Raudenbush’s research involves the development, testing, refinement, and application of statistical methods for individual change and the effects of social settings such as schools, and neighborhoods on change. Recently, he has become interested in the assessment of social settings in which persons develop, for example, neighborhoods as schools and classrooms. Evaluation of the reliability and validity of assessments of these social settings borrows from and extends tools from psychometrics, as explained in recent articles in Science, Sociological Methodology, and The American Journal of Sociology. He calls this line of work “ecometrics” (assessment of ecological settings) as distinct from “psychometrics” (assessment of psychological traits and states). Raudenbush has co-authored a series of articles in Psychological Methods on the design of multilevel and longitudinal experiments.