Roger E. Kirk received his Ph.D. in experimental psychology from the Ohio State University and did post doctoral study in mathematical psychology at the University of Michigan. He is a Distinguished Professor of Psychology and Statistics at Baylor University. He founded, and for 25 years, directed Baylor's Behavioral Statistics Ph.D. program and the Institute of Statistics, now the Department of Statistical Science. For the past 29 years he also has been the president of Research Consultants, a statistical consulting corporation. He has published extensively in the areas of statistics, psychoacoustics, and human engineering, and is the author of five statistics books. Experimental Design:… Procedures for the Behavioral Sciences , his first book, was identified by the Institute for Scientific Information as one of the most frequently cited books in its field. Dr. Kirk is a fellow of the American Psychological Association (Divisions 1, 2, 5, 13, and 21), the Association for Psychological Science, and the American Educational Research Association. He is a past president of the Society for Applied Multivariate Research, Division 5 of the American Psychological Association, and the Southwestern Psychological Association. In recognition of his teaching effectiveness, he was named the Outstanding Tenured Teacher in the College of Arts and Sciences and designated a Master Teacher, Baylor University's highest teaching honor. He is the 2005 recipient of the Jacob Cohen Award for Distinguished Contributions to Teaching and Mentoring from the Division of Evaluation, Measurement, and Statistics of the American Psychological Association.