The 2-volume APA Handbook of Psychotherapy comprehensively presents the field based on the primary ways in which professionals practice psychotherapy and affect such practice through theory, research, and training.

50 authoritative chapters capture the most representative ways in which psychotherapists characterize the driving forces behind their foundational therapeutic approaches. Therapists may:

• Administer psychotherapy according to a specific theoretical orientation, applying this model across most patients and contexts.
• Use a specific, "named" therapy to primarily treat patients suffering from a particular disorder.
• Draw on research evidence to administer psychotherapy in a way that can include, but also transcend, specific theoretical. orientations and disorder-specific interventions.
• Generate data and draw on varied forms of research psychotherapy in a participant-driven and contextually responsive manner.

Frederick T. L. Leong, PhD, is an independent researcher and retired professor of psychology at Michigan State University where he also served as the director of the Consortium for Multicultural Psychology Research. He has authored or coauthored over 300 journal articles and book chapters and edited or coedited 24 books. He is editor-in-chief of the Encyclopedia of Counseling (Sage) and the APA Handbook of Multicultural Psychology (APA). He is the founding editor of the Asian American Journal of Psychology and served as the associate editor of the American Psychologist and the Archives of Scientific Psychology. Dr. Leong is a fellow of the American Psychological Association (Divisions 1, 2, 5, 12, 17, 29, 45, and 52), Association for Psychological Science, Asian American Psychological Association, International Academy for Intercultural Research, and the International Association of Applied Psychology. He is the recipient of the APA Award for Distinguished Contributions to the International Advancement of Psychology, APA Award for Distinguished Service to Psychological Science, Stanley Sue Award for Distinguished Contributions to Diversity in Clinical Psychology from APA's Division 12, APA Division 45 Distinguished Contributions to Research Award, APA Minority Fellowship Program's Dalmas Taylor Distinguished Contributions Award, and Leona Tyler Lifetime Achievement Award from APA Division 17.

Michael J. Constantino, PhD, is professor of psychological and brain sciences at the University of Massachusetts Amherst. He has published over 190 journal articles and book chapters, and he has received ample extramural grant and contract support for his research. He is also coauthor of the book, The Essentials of Deliberate Practice: Cognitive-Behavioral Therapy, and coeditor of the book, Principles of Change: How Psychotherapists Implement Research Findings in Practice. Dr. Constantino has received awards from the International Society for Psychotherapy Research, the American Psychological Association's (APA) Division 29 (Society for the Advancement of Psychotherapy), and the Society for the Exploration of Psychotherapy Integration. Dr. Constantino is also an APA Fellow. He is currently associate editor for Psychotherapy and the Journal of Consulting and Clinical Psychology.

Jeffrey Zimmerman, PhD, has been in independent practice for over 40 years. Dr. Zimmerman is a founding partner of The Practice Institute, LLC, which is dedicated to helping mental health professionals build thriving practices. His most recent coedited book (among numerous published books, chapters, and articles) is titled Bringing Psychotherapy to the Underserved: Challenges and Strategies (2020). Dr. Zimmerman is also the editor of Practice Innovations, the journal of APA Division 42, Independent Practice. In 2004 he received the award for Distinguished Contribution to the Practice of Psychology from the Connecticut Psychological Association. In 2009, Dr. Zimmerman received the ABPP specialty board certification in Clinical Psychology. Dr. Zimmerman is a fellow of APA Divisions 42 and 29. In 2016, Dr. Zimmerman was awarded Distinguished Fellowship in the National Academies of Practice and the Psychology Academy, as a Distinguished Practitioner and Fellow. In 2019, Dr. Zimmerman received the Mentoring Award from Division 42 of the APA.

Jennifer L. Callahan, PhD, is a professor of psychology at the University of North Texas, where she serves as codirector of the Center for Psychosocial Health Disparities Research and director of the Evidence-Based Training and Competencies Research Lab. Dr. Callahan has been awarded more than $7 million in grant funding as PI or co-PI. In addition to multiple awards for quality research (2005; 2020), mentorship (2015), advancement of diversity training in clinical psychology (2022), and community engagement (2022), she has been recognized with the Distinguished Publication of Psychotherapy Research (2012), and the Outstanding Publication in Training and Education in Professional Psychology (2014; 2018). She is the is the current editor-in-chief for the Journal of Psychotherapy Integration and an Associate Editor for the journal Training and Education in Professional Psychology. She is board certified in Clinical Psychology, a fellow of the APA, and President-elect of the international Society for the Exploration of Psychotherapy Integration (SEPI).

Catherine F. Eubanks, PhD, is professor of psychology at the Gordon F. Derner School of Psychology of Adelphi University. She also serves as associate director of the Mount Sinai-Beth Israel Brief Psychotherapy Research Program. In addition to a number of journal articles and book chapters, she is coauthor of Therapist Performance Under Pressure: Negotiating Emotion, Difference and Rupture and coeditor of Rupture and Repair in Psychotherapy: A Critical Process for Change. Dr. Eubanks is a fellow of the Society for the Advancement of Psychotherapy/APA Division 29 and a previous recipient of early career awards from both Division 29 and SPR. She previously served as an associate editor of the Journal of Clinical and Consulting Psychology and currently serves as coeditor of the journal Psychotherapy Research.