Student-instructor relationships outside of the classroom have existed for hundreds of years and remain an important topic in the literature. Universities are increasingly concerned with legislating student-instructor relationships. Few empirical investigations of undergraduate student-instructor relationships are reported in the literature, and such relationships are often considered only in the context of sexual harassment or ethics policies. Most of the writings are opinion based or seated in anecdotal evidence, and seldom are students' opinions considered. In this study, 480 undergraduate students attending (...) a medium-sized Western university were surveyed for their opinions about a variety student-instructor relationships. Factor analysis revealed 5 types of student-faculty relationships: sexual, group activities, doing favors, spending time alone with a faculty member, and business relationships. The students' opinions about these relationships varied, with sexual relationships considered inappropriate, whereas group activities were considered very appropriate. These data suggest that university officials who are building policy regarding faculty-student relationships need to consider different types of relationships along with students' developing autonomy. (shrink)