Internal Family Therapy (IFS) involves two paradigms: diversity of thought and systems thinking. The first is to develop the understanding that humans have internal "parts" present in Freud's concepts of ego, id, and superego; in the analysis of transactions in object relations. The final paradigm applies the theory of family therapy to this part of the human being.
The general patterns of family interaction as well as the patterns of traumatic interactions between the insides of a person are similar to how a child from a dysfunctional family can be placed in a particular role. You can also get more information about ifs internal family systems therapy via https://www.neshimahealing.com/internal-family-systems-ifs/.
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If someone was seriously injured as a child, some of them may be "trapped" during this time – in IFS this is called seclusion. Other units may be there to protect these outcasts, for example, to keep them away from close relationships – this unit is called the manager.
Other part groups become active when the outcast is activated, for example after a breakup. These parts are firefighting and can be expressed as drug use, food, or other substances or behavior.
An important assumption of IFS is that apart from the various sections, everyone has a quiet, confident, caring, and curious Core. The ego, under the guidance of the therapist, can take an increasingly important role in a person's inner workings and play the inner role of "parent", "judge" or "therapist" for that person.