The present study examined people's working definitions of intimacy, which
emerge through daily interactions that are perceived as intimate by the par
ticipant. We proposed that working definitions should be reflected in a set
of interaction characteristics that prompt relationship partners to label
their interaction as intimate. Participants were 113 cohabiting couples who
completed questionnaires and kept diaries of their interactions' for 1 wee
k. Interaction characteristics explaining perceived intimacy were interacti
on pleasantness, disclosure of private information, the expression of posit
ive feelings, the perception of being understood by one's partner, and the
disclosure of emotion. Further, more satisfied couples perceived their inte
ractions as more intimate and showed stronger associations between interact
ion intimacy and partner disclosure than did less satisfied couples. Findin
gs indicated that couple characteristics are more salient than person chara
cteristics as predictors of intimacy in interactions.