Model Wewnętrznych Systemów Rodzinnych ( – IFS) – integracyjne podejście w psychoterapii indywidualnej opracowane przez terapeutę Richarda C. Schwartza w latach 80. XX wiekuLogan, Sadye L. M. (2008). „Family: Overview”. In Mizrahi, Terry; Davis, Larry E. (eds.). Encyclopedia of Social Work. Oxford University Press, USA. pp. 2:175–182. .Minor, Amanda J. (2016). „Internal Family Systems Model”. In Carlson, Jon; Dermer, Shannon B. (eds.). The SAGE Encyclopedia of Marriage, Family, and Couples Counseling. SAGE Publications. . Retrieved 28 January 2020. The Internal Family Systems (IFS) model was developed by Richard C. Schwartz in the 1980s and describes and integrative, nonpathological approach to psychotherapy.... The premise of IFS is that similar to the complex external family system, individuals are composed of separate and multifaceted internal parts in relationship with each other. IFS’s primary focus is to work with individuals and help differentiate parts or subpersonalities in the mind.. Łączy ono myślenie systemowe z podejściem, w którym psychika składa się z podosobowości (części). Każda z nich charakteryzuje się indywidualnym punktem widzenia i cechami.