Two constructs integral to the interpersonal development of late adolescents, to their continuing parental attachment and to social support, were investigated to assess whether they were conceptually distinct and related to indices of adjustment following a romantic relationship. Undergraduate students (N=241) who had experienced a relationship breakup within the last year participated in the study. As hypothesized, analyses revealed that current attachment levels were related to each of the outcome variables. Indices of social functioning accounted for additional variance only when conceptualized as perceived connection to the social environment, but not in terms of perceived support from family and friends. The results are discussed in relation to counseling interventions with clients experiencing relationship difficulties. (Contains 89 references and 3 tables.) (JDM)