Case Scenario: Diego is a counselor and wants to determine if individual counseling, couples counseling, or family counseling works better at improving satisfaction with the relationship among couples who are having relationship problems. Diego recruits 30 couples that are completely dissatisfied with their relationship and assigns 10 couples to each type of therapy (N = 30). Then, after 12 weeks in therapy, Diego collects data about relationship satisfaction from each of the couples using a Couples Relationship Satisfaction Scale that ranges from 0 to 100, with 0 being no satisfaction in the relationship, and 100 being completely satisfied with the relationship.