The impact of the transition to cohabitation on relationship functioning: cross-sectional and longitudinal findings

Most Americans now live together before they marry but little is known about how the transition from dating to cohabiting affects relationships. In two studies, we compared dating and cohabiting relationships in terms of commitment and several indices of relationship quality. In Study 1, we used a nationally representative sample of 1,294 unmarried individuals in opposite sex relationships who completed surveys by mail. Findings showed that cohabiting relationships were characterized by more commitment, lower satisfaction, more negative communication, and more physical aggression than dating (noncohabiting) relationships; controlling for selection factors mitigated some of these differences. Study 2 used a subsample of the Study 1 sample to longitudinally examine how transitioning from dating to cohabiting changes a relationship on the same dimensions. Six waves of mailed surveys spanning 20 months were employed. Findings of Study 2 indicated that individuals experienced declines in most indices of relationship quality as well as in interpersonal commitment after cohabitation began, though the frequency of sex increased temporarily. Constraints to stay together substantially increased with cohabitation and over time. Implications of these findings for future research are discussed.