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Coherence [Latin cohaerere, to hang together] refers to the unity of single elements in a superordinate whole. In reference to a system, the concept describes "the behavior of a system-being-self" (Dell, 1982, p.31). Dell argues that the term coherence should replace homeostasis.
  • Dell, P.F. Beyond Homeostasis: Toward a concept of coherence. Family Process 21: 21-41, 1982.

Definition extracted with permission from Simon, Fritz, et al, Family Process, Inc.: Language of Family Therapy: A Systemic Vocabulary and Source Book (Family Process Press Series)