Internal Family Systems Model

The Internal Family Systems (IFS) model is a non-pathologizing approach to individual psychotherapy developed by Richard C. Schwartz. It combines systems thinking with the view that the mind is composed of relatively discrete subpersonalities, or "parts," each with its own unique viewpoint and qualities. The goal of the therapy is to help clients access their "Self"—described as a core state of compassion and clarity that remains undamaged by trauma—to heal and integrate these parts. In 2015, IFS was listed on the National Registry of Evidence-based Programs and Practices (NREPP) as an evidence-based practice. A 2025 scoping review published in Clinical Psychologist identified IFS as a "promising therapeutic approach" for conditions such as PTSD, depression, and chronic pain, noting significant symptom reduction in pilot trials. It is frequently applied in the treatment of complex post-traumatic stress disorder (C-PTSD), anxiety, and depression.

The model has been widely adopted in clinical trauma treatment and popularized by media such as the film Inside Out. However, it has also faced scrutiny regarding its training practices and rapid expansion. A 2025 investigative report by New York Magazine criticized the model as "pseudoscientific," alleging that "parts work" can be destabilizing for clients with complex trauma if protective mechanisms are bypassed too quickly. In response to the report, the IFS Institute disputed the characterization of the therapy as pseudoscientific, stating that the cases cited involved extreme misapplications of the model distinct from standard training protocols.