A report on a study of freshmen women's beliefs about psychological sex differences, attitudes toward sex roles, and ideals of femininity and masculinity is presented. A random sample of 232 freshmen entering a woman's college in September 1979 was studied longitudinally. Study instruments included a scale consisting of 16 propositions regarding psychological sex differences, the Attitudes Towards Women Scale, and the Gough Adjective Check List for "My Ideal Woman" and "My Ideal Man." During fall 1980, the sophomores were readministered the study instruments, and 68 case studies were developed, based on interviews. A summary of the research findings is presented that indicates that the freshmen tended to reject the familiar psychological sex stereotypes and to endorse egalitarian sex roles. The following research areas are examined in depth, with case study illustrations: student transition to college and the vulnerability of freshmen to the first year of college; occupational plans, 1979-1983; life-style preferences, 1979-1983; female and male professors and female peers as agents of socialization for adult roles; and emotional and sexual relationships with men. Appendices include the interview guide and selected questionnaires. (SW)