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. These chapters represent the latest thinking and evidence on the most relevant topics across the "big four" psychotherapy domains of theory, research, practice, and training. All four parts are written for researchers, practitioners, scholars, and trainers, with the major difference among the sections being their emphasis on, and order of, discussing the "big four" elements.

This 2-volume handbook presents a comprehensive overview of the primary approaches to theory, research, training, and practice in psychotherapy.

Volume 1. Theory-Driven Practice and Disorder-Driven Practice 
Part I. Theory-Driven Practice 

Chapter 1. Introduction to Volume 1, Part I: Theory-Driven Practice 
Jennifer L. Callahan and Jeffrey Zimmerman 

Chapter 2. Psychoanalytic Theory in Psychotherapy  
Pratyusha Tummala-Narra and Jonathan Wolff  

Chapter 3. Psychodynamic and Relational Psychotherapies 
Charles J. Gelso and Kathryn V. Kline 

Chapter 4. Existential-Humanistic and Existential-Integrative Theory  
Kirk J. Schneider and Louis Hoffman  

Chapter 5. Person-Centered Theory in Psychotherapy  
Mick Cooper and Gina Di Malta 

Chapter 6. Gestalt Therapy: A Contemporary View 
Robert W. Resnick 

Chapter 7. Experiential Theory in Psychotherapy 
Ueli Kramer and Ladislav Timulak  

Chapter 8. Emotion-Focused Therapy 
Antonio Pascual-Leone and Stephanie Nardone 

Chapter 9. Psychotherapy Through the Lens of Contemporary Integrative Interpersonal Theory 
Nicole M. Cain, Christopher J. Hopwood, and Aaron L. Pincus 

Chapter 10. Exposure-Based and Behavioral Theory in Psychotherapy 
Anne N. Banducci, Bryna N. Cooper, Jennifer M. Betts, and Kelsey N. Serier 

Chapter 11. Cognitive Theory in Psychotherapy 
Keith S. Dobson and Nikolaos Kazantzis 

Chapter 12. Couple Theory in Psychotherapy 
Jay L. Lebow, Adam R. Fisher, and Sarah E. Swanson 

Chapter 13. The Imprint of Systems Theory Upon Psychotherapeutic Process 
K. Mark Sossin 

Chapter 14. Psychotherapy Integration: History, Current Status, and Future Directions 
Jack C. Anchin, Tomáš Řiháček, Jan Roubal, and James F. Boswell 

Chapter 15. Constructivist Theories in Psychotherapy  
Jonathan D. Raskin and Sara K. Bridges 

Chapter 16. Gender and Affectional Orientation: Theoretical Underpinnings of Psychotherapy Practice 
Amy E. Ellis 

Chapter 17. Cross-Cultural Theories in Psychotherapy 
Frederick T.L. Leong 

Part II. Disorder-Driven Practice 

Chapter 18. Introduction to Volume 1, Part II: Disorder-Driven Practice 
Jeffrey Zimmerman and Jennifer L. Callahan 

Chapter 19. Anxiety Disorders 
Shannon Sauer-Zavala, Matthew W. Southward, and Clair Cassiello-Robbins 

Chapter 20. Mood Disorders 
Heather A. MacPherson and Eric A. Youngstrom 

Chapter 21. Psychotic Disorders  
David C. Cicero 

Chapter 22. Personality Disorders 
Jeffrey J. Magnavita and Barbara L. Ingram  

Chapter 23. Eating Disorders 
Jessica Van Huysse and Jessica Luzier 

Chapter 24. Addressing Substance Use in Clinical Assessment and Treatment 
M. Dolores Cimini, Jessica L. Martin, and Laura M. Longo  

Chapter 25. Traumatic Disorders  
Nnamdi Pole and Lisa Rasco 

Chapter 26. Chronic Pain: Psychologically-Based Treatments 
Robert S. Meyers 

Chapter 27. Sexual Dysfunctions  
Marta Meana and Kathryn Hall 

Part III. Ethical Considerations and Future Directions in Theory-Driven Practice and Disorder-Driven Practice 

Chapter 28. Ethical Considerations of Theory-Driven and Disorder-Driven Practice 
Mark M. Leach and Linda Campbell  

Chapter 29. Future Directions in Theory-Driven and Disorder-Driven Practice  
Jennifer L. Callahan and Jeffrey Zimmerman  

Volume 2. Evidence-Based Practice, Practice-Based Evidence, and Contextual Participant-Driven Practice 
Part I. Evidence-Based Practice 

Chapter 1. Introduction to Volume 2, Part I: Evidence-Based Practice  
Catherine F. Eubanks and Michael J. Constantino  

Chapter 2. Do Some Theory-Specific Psychotherapies Outperform Others (Relative Efficacy)? A Stepwise Approach to Contextualizing the Results of Randomized Controlled Trials With Direct Psychotherapy Comparisons 
Christoph Flückiger and A.C. Del Re  

Chapter 3. Are Theory-Specific Treatment Factors Responsible for Psychotherapeutic Change?
Daniel R. Strunk and Samuel T. Murphy  

Chapter 4. Are Common Factors Responsible for Therapeutic Change? 
Catherine F. Eubanks and Anna Babl  

Chapter 5. Do Certain Patients Respond Better to Specific Forms of Psychotherapy? 
Wolfgang Lutz, Juan Martin Gómez Penedo, Jessica Prinz, Julian Rubel, and Danilo Moggia  

Chapter 6. Can Psychotherapies be Effectively Adapted to Cultural Identity (Fit)?  
Alberto Soto 

Chapter 7. Responsiveness: Can Psychotherapies and Psychotherapists Adapt Effectively to Participant and Clinical Contexts?  
Jeanne C. Watson and Hadas Wiseman  

Chapter 8. Evidence-Based Psychotherapy: On What Can We Agree?
Averi N. Gaines and Marvin R. Goldfried  

Chapter 9. How Can We Most Effectively Conceptualize and Conduct Psychotherapy According to Evidence-Based Principles?  A Consideration of Change Processes, Clinical Choices, and Positions
J. Christopher Muran and Lauren M. Lipner  

Chapter 10. What is the Current Configuration of Evidence-Based Psychotherapy? Integrating Common Factors Into Personalized Care 
David Kealy and John S. Ogrodniczuk  

Part II. Practice-Based Evidence and Contextual Participant-Driven Practice 

Chapter 11. Introduction to Volume 2, Part II: Practice-Based Evidence and Contextual Participant-Driven Practice 
Michael J. Constantino and Catherine F. Eubanks 

Chapter 12. Does Controlled Research on Psychotherapy Translate to Naturalistic Practice Settings (Effectiveness)? 
Lily A. Brown, Rachel Schwartz, Nora Brier, Lindiwe Mayinja, and Bridget Feler  

Chapter 13. Does Practice-Generated Data Improve Psychotherapy Effectiveness (Routine Outcome Monitoring)?
Robert J. Reese, Barry L. Duncan, and Alyssa L. Clements-Hickman 

Chapter 14. Do Therapists Differ in their General Effectiveness? Therapist Effects and Their Determinants
Helene A. Nissen-Lie, Hanne W. Oddli, and Erkki Heinonen  

Chapter 15. Therapist Performance Report Cards: Do Clinicians Differ in their Specific Effectiveness?
Alice E. Coyne  

Chapter 16. Can We Harness Therapist Effects for Therapeutic Benefit?
Michael J. Constantino and Heather J. Muir 

Chapter 17. Do Therapists Get Better With Experience?
Terence J.G. Tracey, James W. Lichtenberg, Rodney K. Goodyear, and Bruce E. Wampold  

Chapter 18. What is a Contemporary Patient-Centered Perspective on Psychotherapy Processes and Outcomes?
Joshua K. Swift, Mick Cooper, and Ladislav Timulak  

Chapter 19. What are Pathways and Barriers to Implementing Evidence-Based Practice and Practice-Based Evidence in Psychotherapy?
James F. Boswell and Carly M. Schwartzman  

Part III. Ethical Considerations and Future Directions in Practice-Based Evidence, Evidence-Based Practice, and Contextual Participant-Driven Practice 

Chapter 20. What Are the Primary Ethical Considerations of Evidence-Based Practice and Practice-Based Evidence?
Samuel Knapp, Randy Fingerhut, Michael C. Gottlieb, and Mitchell M. Handelsman 

Chapter 21. What are some Primary Future Directions for Psychotherapy Research, Practice, and Training?
Dana Atzil-Slonim