Published online by Cambridge University Press: 09 February 2026
Relationship development and growth have long drawn the interest of relationship scholars. This chapter focuses on the theoretical frameworks that have guided inquiry. We begin by explicating the term relationship development, including different ways researchers have studied it. Traditional theories (e.g., relational dialectics, relationship stage models, social exchange, social penetration, relational turning points) are described, alongside recently developed perspectives on relationship development and growth (e.g., relational turbulence theory, the relationship trajectory framework). The chapter also discusses current research associated with the theories and how this scholarship informs our understanding of the initiation of relationships and how relationships develop over the lifespan. Special attention is paid to the development and maintenance of marginalized relationships. The chapter concludes with suggestions for future research, including the need to assess the ability of current theories to describe development in different relationship contexts (e.g.., friendships, courtship, families) and in different communication contexts (e.g., online, offline).
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