Louis G. Castonguay, PhD, completed his doctorate in Clinical Psychology at S.U.N.Y. Stony Brook, a clinical internship at U.C. Berkeley, and a Post-doctorate at Stanford University. He is currently a Professor at the Department of Psychology at Penn State University. With more than 8 publications (including eight co-edited books), his scholarly work and research focus on different aspects of the process of change and training, especially within the context of psychotherapy integration of psychotherapy. He is also involved in the investigation of the efficacy of new integrative treatments for generalized anxiety disorder and depression, and the development of Practice Research Networks aimed at facilitating the collaboration between clinicians and researchers. He has received several awards, including the Early Career Contribution Award from the Society of Psychotherapy Research, and the David Shakow Award from the Division of Clinical Psychology of the American Psychological Association (APA). He has also received four recognitions from the APA Division of Psychotherapy: the Jack D. Krasner Memorial Award, the Distinguished Contributions to Teaching and Mentoring, the Distinguished Research Publications Award, and the Distinguished Psychologist Award for his life time contributions to the field of psychotherapy. He also served as President of the North American Society for Psychotherapy Research, as well as the International Society for Psychotherapy Research.

Clara E. Hill, PhD, completed her doctorate in Counseling Psychology at Southern Illinois University and a clinical internship at University of Florida. She is currently a Professor in the Department of Psychology at the University of Maryland. With 2 books, 74 book chapters, and 2 5 journal articles, her scholarly work and research focus on psychotherapy process, therapist interventions, therapist training, dream work, meaning in life, and qualitative research methods. She has received several awards, including the Leona Tyler Award from Division 7 of the American Psychological Association, the Distinguished Psychologist Award from Division 29 of the American Psychological Association, the Outstanding Lifetime Achievement Award from the Section of Counseling and Psychotherapy Process and Outcome Research of the Society for Counseling Psychology, and the Distinguished Research Career Award, Society for Psychotherapy Research. She served as the Editor of the Journal of Counseling Psychology and Psychotherapy Research, and also served as the President of the North American Society for Psychotherapy Research, as well as the International Society for Psychotherapy Research.