This study focuses on predictors of student sensitivity to college tuition and financial aid in their college choice process. Data were drawn from a longitudinal study on the postsecondary education choices of high school students in the state of Indiana. The variables student and family background, student academic characteristics, student perceptions of family financial support, student connections with institutions, and student awareness of financial aid programs were measured against student price sensitivity. Multiple regression analysis of the data suggests that students are rational actors in their decisions and that price sensitivity is complex. As family income, or the perception of parental willingness to pay, increases student sensitivity to tuition costs and financial aid decreases. Women, however, appear to be more sensitive to tuition costs than men, suggesting that females perceive gender bias in family willingness to pay. The results also indicate that information about specific institutions, about postsecondary education in general, and about financial aid influence tuition and financial aid sensitivity; however, institutional information appears to be negatively associated with tuition sensitivity. Five tables summarize the data. An appendix notes measurement of dependent and independent variables. (Contains 31 references.) (CH)