Published online by Cambridge University Press: 09 February 2026
Research has advanced our understanding of the role of self-disclosure in the initiation, development, maintenance, and ending of relationships. In this chapter, we review theoretical and empirical milestones in our understanding of self-disclosure, particularly its role in relationships. We show that research on self-disclosure has shifted from a focus on the individual to a focus on the interpersonal nature of disclosure processes. Self-disclosure occurs between people and triggers a cyclical process that is specific to a particular relationship with a particular partner. Self-disclosure processes fluctuate over time. They shape, and are shaped by, relationships. We propose that self-disclosure serves as a seismograph of relationship quality. It is essential in interdependent relationships and key to unraveling how people perceive the quality of their relationships. Throughout the chapter, we identify unanswered questions that offer promising avenues for future research.
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