therapy in which both partners in a committed relationship are treated at the same time by the same therapist or therapists. Couples therapy is concerned with problems within and between the individuals that affect the relationship. For example, one partner may have undiagnosed depression that is affecting the relationship, or both partners may have trouble communicating effectively with one another. Individual sessions may be provided separately to each partner, particularly at the beginning of therapy; most of the course of therapy, however, is provided to both partners together. Couples therapy for married couples is known as marital therapy.