Sources & Key Research — Internal Family Systems + Parts Work

[1] IFS Institute. The Internal Family Systems Model Outline; IFS Glossary of Terms. Read more.

[2] Joss, D. et al. (2026). A randomized controlled trial of an online group-based internal family systems treatment for posttraumatic stress disorder: The PARTS study. Psychological Trauma. Read study.

[3] Haddock, S. A. et al. (2017). The Efficacy of Internal Family Systems Therapy in the Treatment of Depression Among Female College Students: A Pilot Study. Journal of Marital Family Therapy. Read study.

[4] Shadick, N. A. et al. (2013). A randomized controlled trial of an internal family systems-based psychotherapeutic intervention on outcomes in rheumatoid arthritis: a proof-of-concept study. The Journal of Rheumatology. Read study.

[5] Phoenix Australia. Australian Guidelines for the Prevention Treatment of Acute Stress Disorder, Posttraumatic Stress Disorder Complex PTSD. Read guidelines.

[6] Bernstein, G. (2024). Self Help: This Is Your Chance to Change Your Life. Hay House. Further reading, not clinical evidence. Read more.