This study was designed to test the circumplex model of family systems that hypothesizes moderate family cohesion and moderate adaptability to be more functional than either extreme. Thirty‐one Catholic family triads with daughters ranging in age from 14 to 17 years participated in a structured family interaction game (SIMFAM) and filled out questionnaires that measured the variables of cohesion and adaptability and the facilitative variables of support and creativity. All families were considered normal but were subdivided into those that had more and less difficulty with this adolescent. Analysis of the data yielded considerable support for the circumplex model. High family functioning was associated with moderate family cohesion and adaptability, and low family functioning had extreme scores on these dimensions. As predicted, high family support and creativity were also related to high family functioning. Implications of these findings for family therapy are discusse