Because much conjecture (but limited empirical research) exists about the nonverbal variable to time, this exploratory study investigated the effects of differential arrival times on four dimensions of source credibility: sociability, dynamism, competence, and composure. Subjects were 84 educational secretaries with a mean age of 49 years. Each subject completed 25 semantic differential credibility scales for each of three arrival times: 15 minutes early, on time, and 15 minutes late. Data were analyzed with factor analysis, analyses of variance, and appropriate Scheffe tests. Results showed that: (1) the late arriver is perceived as less sociable and less competent than early or on-time arrivers; (2) the early arriver is perceived as less dynamic than the late or on-time arrivers; and (3) the on-time arriver is perceived as most composed while the late arriver is perceived as least composed. (Author/TS)