Jack Michael, professor in the Psychology Department at Western Michigan University, obtained his Ph.D. in 1955 at UCLA. During his first teaching position at Kansas University he was much influenced by reading B. F. Skinner's Science and Human Behavior. As a result of the influence of rehabilitation psychologist Lee Meyerson at the University of Houston he began to apply behavioral concepts in developmental and physical disabilities, and in mental illness. His interest in college teaching technology resulted from his association with Fred Keller at Arizona State University. He has been at WMU for over 35 years, where he teaches basic behavior analysis, behavioral approaches to motivation, verbal behavior, and college teaching. Michael has received awards for Distinguished Service to Behavior Analysis (Society for the Advancement of Behavior Analysis), Distinguished Teaching and Distinguished Faculty Scholar (Western Michigan University); Distinguished Teaching (American Psychological Foundation), and the Don Hake Award (Division 25 of the American Psychological Association). In publications and presentations he has worked to define, clarify, and analyze basic and applied behavioral phenomena. Concepts and Principles of Behavior Analysis presents a cross section of his work on many issues and provides a strong base for further study of behavior analysis. The Second Edition will contain an enlarged introductory chapter on basic behavioral principles; and new articles on motivation, verbal behavior, diagramming complex behavioral procedures, remembering and forgetting, the discriminative stimulus, and others.