Dr. Barry S. Stein is Chair and Professor of Psychology at Tennessee Technological University. Dr. Stein received his Ph.D. from Vanderbilt University in cognitive psychology and has authored and coauthored numerous articles on learning, problem solving, and critical thinking throughout his career. He is coauthor of the Ideal Problem Solver: A guide for improving thinking, learning and creativity. He was the principal investigator for three National Science Foundation Grants to refine and disseminate the Critical thinking Assessment Test (CAT) and is Co-Director of the Center for Assessment & Improvement of Learning. Dr. Stein has given numerous presentations and workshops on assessing critical thinking across the country.