NIAAA established the Jack Mendelson, M.D., Honorary Lecture Series commemorating Dr. Mendelson ’ s remarkable contributions to the field of clinical alcohol research. In 2019 NIAAA selected Carlo C. DiClemente, PhD, to deliver NIAAA ’ s 11th Annual Mendelson Lecture. Dr. DiClemente is Emeritus Professor of Psychology, University of Maryland Baltimore County, and Director of the MDQuit Resource Center. His research has focused on understanding the process of behavior change both with and without a treatment. His work led to the development of the Transtheoretical Model of Intentional Behavior Change (TTM) that identified Stages, and Processes of change. This seminal research confirmed the importance of stages and process of change and launched a series of research studies to examine ta...