Published online by Cambridge University Press: 09 February 2026
There has been a growing body of research examining the longitudinal course of couple relationships. In this chapter, our goal is to synthesize and critically evaluate the research on long-term couple relationships, highlighting what we have learned and the advances that have been made to earlier work, while being inclusive of a variety of methodological and analytical approaches. We discuss early studies on long-term relationships; research assessing the different pathways of development as well as the antecedents, correlates and outcomes of various patterns of change; and the crucial role of self-help advice and intervention/prevention programs for fostering long-term couple relationships. We argue that although there has been progress in this area, the research still lacks much-needed diversity, and we consider broader limitations and directions for future research.
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