William R. Miller, PhD, is Emeritus Distinguished Professor of Psychology and Psychiatry at the University of New Mexico. He introduced motivational interviewing in a 1983 article and in the first edition of Motivational Interviewing (1991), coauthored with Stephen Rollnick. Dr. Miller’s research has focused particularly on the treatment and prevention of addictions and more broadly on the psychology of change. He is a recipient of two career achievement awards from the American Psychological Association, the international Jellinek Memorial Award, and an Innovators Award from the Robert Wood Johnson Foundation, among many other honors. His publications include 65 books and over 400 articles and chapters. His website is https://williamrmiller.net.

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Janet C'de Baca, PhD, received her doctorate in clinical psychology from the University of New Mexico. She is currently a research scientist with the Behavioral Health Research Center of the Southwest, in Albuquerque. Her professional interests include cross-cultural psychology and the prevention and treatment of addictive behaviors.