Progress in the study of relationships has depended in part on the recognit
ion that relationships have properties not relevant to interactions or to:t
he behavior of individuals, and may require additional principles of explan
ation. This has led to an emphasis on relationships as linking individuals.
In this article we argue that relationship processes occur in the heads of
individuals, with the participants having their own idiosyncratic views of
the relationship as well as a shared one. The relationship is both affecte
d by and affects the self-concepts of the participants, so that the influen
ces of the self-concept may be critical fbr understanding the properties an
d dynamics of relationships. Furthermore, consideration of the self-concept
can assist in the integration of different but not necessarily incompatibl
e explanations for the same relationship phenomena.