This study compared professional socialization outcomes in two groups of adult students in part time Masters of Social Work programs, 44 with an undergraduate degree in social work and at least 1 year of relevant work experience, and 26 with undergraduate degrees and work experience in other fields. Subjects were given three measures of attitudes and values at three times during the program: (1) at the beginning or early in the program, (2) about halfway through the program, and (3) during the professional practicum. No significant differences were found between the groups. Results are interpreted in terms of concepts of professional socialization including the concept of changes occurring during the stages of socialization, the concept of re-socialization versus socialization, and the concept of "role-aging". Tables detail the study's results. (Contains 17 references.) (DB)