Research on multiple relationships by practicing psychologists has typically presumed the presence of a professional relationship and focused on the ethicality of subsequent, nonprofessional relationships. Instead, this study focused on the question of what, exactly, constitutes the professional relationship in the first place. Practicing psychologists and undergraduates responded to vignettes portraying various early stages of interaction between a therapist and a prospective client. Participants' responses indicated that determinations of professional relationship establishment, and the ethicality of subsequent nonprofessional relationships, depended upon (...) the degree of engagement. Some differences emerged between perceptions by professionals and nonprofessionals. Ethical and professional implications are discussed. (shrink)