Based on the definition of closeness as the degree to which an individual perceives another as understanding him, this study examines some of the dimensions that appear to affect the perception of closeness in dyads. The modes of interpersonal communication which were examined are self-disclosure, touch, and metarelationship communication. Seventy-five questionnaires were completed by college students enrolled in classes in psychology, sociology, and communications. The data indicated that degree of trust and amount of self-disclosure are the primary bases for the perception of the closeness of a relationship. It is suggested that a behavioral index of the closeness of a relationship could be established by observing the amounts of self-disclosure, metarelationship communication, and touch that occur during interactions. (LL)