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. Theresa B. Moyers, PhD, is Associate Professor of Psychology at the University of New Mexico, where she conducts research on treatments for addictive behaviors, with a focus on motivational interviewing (MI). Her primary interests are identifying the active ingredients of MI as well optimal methods for disseminating it in addictions settings. Dr. Moyers has published more than 35 peer-reviewed articles and has presented on MI and addictions treatment in 16 countries. She is a member of the Motivational Interviewing Network of Trainers. In addition to her academic pursuits, she trains and competes with her border collie in the sport of dog agility.Her website is www.theresamoyers.com.