The number of undergraduates studying part-time in four-year colleges and universities has been steadily increasing over the past decade. The purpose of this project was to identify basic characteristics of Scholastic Aptitude Test (SAT) candidates planning to study part time, to examine the trends in part-time enrollment in colleges requiring the SAT, to investigate the policies of those colleges regarding admissions requirements for part-time students, and to determine whether those colleges are concerned about the validity of the SAT for part-time students. (18pp.)