Christopher C. Wagner is an associate professor, licensed clinical psychologist, and certified rehabilitation counselor. His scholarship focuses on motivational interviewing (MI) and interpersonal processes in mental health/substance abuse treatment. He has focused on expanding MI theory and practice to a broader focus than originally conceived as well as developing MI group psychotherapy. He is the lead author on the MI in Groups book that is part of the official Guilford Press series on MI. His practice and training has included outpatient, inpatient and residential treatment of individuals and groups with a variety of health, mental health and addiction problems. Dr. Wagner can be reached by email at ccwagner@vcu.edu.