Part I of this report describes results of studies concerning "net change" of personality from analyses pooling students from all the 13 colleges participating in the Project on Student Development and from analyses pooling all students retested within each college. The findings indicated that: (1) changes occurred in most of the areas measured by the Omnibus Personality Inventory; (2) the directions and amount of net change were similar for both men and women, and for the diverse groups of entering freshmen; (3) the directions and amount of change were also similar at all the Project colleges despite the dramatic differences among them; and (4) changes in particular attitudes, beliefs and behaviors were common to many of the different types of students at the different colleges. Part II describes results from studies of change in selected subgroups of students and studies of relationships between changes among students and institutional characteristics. The findings indicated that similar students attending different colleges reflected different patterns of change; and changes among the sub-groups were systematically related to institutional differences in college climate or emphasis. (AF)