Family Systems Theory

Family therapy (also referred to as family counseling, family systems therapy, marriage and family therapy, couple and family therapy) is a branch of psychology that works with families and couples in intimate relationships to nurture change and development. It tends to view change in terms of the systems of interaction between family members. https://en.wikipedia.org/wiki/Family_therapy

• cf Virginia Satir

Systems psychology is a branch of both theoretical psychology and applied psychology that studies human behaviour and experience as complex systems. It is inspired by systems theory and systems thinking, and based on the theoretical work of Roger Barker, Gregory Bateson, Humberto Maturana and others.[1] Groups and individuals are considered as systems in homeostasis. Alternative terms here are "systemic psychology", "systems behavior", and "systems-based psychology". https://en.wikipedia.org/wiki/Systems_psychology#Family_system_therapy