Randall E. Schumacker received his Ph.D. in educational psychology from Southern Illinois University. He is currently professor of educational research at the University of North Texas, where he teaches courses in structural equation modeling, quantitative research methodology, statistical simulation, and measurement. His research focuses are varied, including best model selection methods, robust statistics, teacher accountability, and measurement issues related to ability estimation, mixed-item formats, and reliability. He has published in several journals including Academic Medicine, Educational and Psychological Measurement, Journal of Applied Measurement, Journal of Educational and Behavioral Statistics, Journal of Research Methodology, Multiple Linear Regression Viewpoints, and Structural Equation Modeling. He has served on the editorial boards of numerous journals and is a member of the American Educational Research Association and American Psychological Association-Division 5, and is past president of the Southwest Educational Research Association, and emeritus editor of the journal Structural Equation Modeling.