Dr. DiClemente is an emeritus professor of psychology at UMBC and formerly at the University of Houston and the University of Texas Medical School. He currently directs several training centers at UMBC. He is co-developer of the transtheoretical model of behavior change, and author of numerous publications on motivation and behavior change with a variety of health and addictive behaviors. In 2018 he published the second edition of Addiction and Change: How Addictions Develop and Addicted People Recover and has co-authored several professional books, The Transtheoretical Model, Substance Abuse Treatment and the Stages of Change (Second Edition), and Group Treatment for Substance Abuse: A Stages of Change Therapy Manual (Second Edition), and a self-help book, Changing for Good.