Dr. Joan Farrell, PhD, is a clinical psychologist, researcher, and trainer, widely recognized for her pioneering contributions to Group Schema Therapy (GST). She co-developed the GST model alongside Ida Shaw, and their collaborative work has significantly expanded the accessibility and effectiveness of Schema Therapy, especially for complex and treatment-resistant conditions.

Joan served as Research Director for the Center for Borderline Personality Disorder Treatment and Research at Indiana University–Purdue University Indianapolis and as a clinical professor at the Indiana University School of Medicine for 25 years. She has led or contributed to numerous randomized controlled trials supporting the efficacy of Schema Therapy. Her research has helped establish Schema Therapy as an evidence-based treatment for borderline personality disorder and other complex mental health conditions.

A founding member and certified supervisor/trainer in individual and group ST with the International Society of Schema Therapy (ISST), Joan has played a crucial role in global training initiatives, particularly in training therapists to deliver Schema Therapy in group formats. She is co-director of the Schema Therapy Institute – Cleveland and served as Training & Certification Coordinator on the ISST Executive Board 2012-2018. She has written four books on ST: Group Schema Therapy for Borderline Personality Disorder: A Step-by-Step Treatment Manual, The Schema Therapy Clinician’s Guide, Experiencing ST from the Inside Out: A Self-Practice-Self-Reflection Workbook for Therapists, and The Deliberate Practice of Schema Therapy, which are widely used in clinical settings and training programs.