Abstract
Extends work of Mahler (1975) and Kaplan (1978) to the diagnosis of couples' systems. Identifies 5 couple stages: symbiotic-symbiotic; symbiotic-practicing; practicing-practicing; Mutual interdependence-mutual interdependence; and Synergistic-synergistic. Describes the characteristics of each system, and illustrates selected aspects from couple interviews. This model is used educationally with couples, and often becomes a facilitative tool for the couple. The model is suggested to facilitate the therapist's diagnosis and intervention selection.