Abstract The circumplex model of marital and family systems is anchored in family systems theory. This model illustrates the reactions and adaptations of families to the stressors they experience developmentally. The model represents the interaction of dimensions of cohesion (emotional bonding) and flexibility (stability of a system). Importantly, a system is not fixed in a static point as families constantly adjust. The original circumplex model as it applies to family systems is attributed to the work of David H. Olson. Olson and coworkers also developed a program used in marriage and family counseling contexts called the PREPARE/ENRICH program. The family assessment tool that was developed in conjunction with the circumplex model is the Family Adaptability and Cohesion Evaluation Scale.