The measurement of college impact on students has received much attention over the past two decades. To examine stability and change in personality, vocational orientation, study habits, and attitudes of college students from freshman to senior year, two samples of undergraduates (N=51) were tested as freshmen and as seniors. Students completed the Jackson Personality Inventory (JPI), the Sixteen Personality Factor (16PF) Test, the Strong-Campbell Interest Inventory (SCII), and the Survey of Study Habits and Attitudes (SSHA). An analysis of the results showed a general overall pattern of continuity for personality characteristics and vocational interests from freshman to senior year. Change occurred on only two dimensions of the 16PF, with students becoming more introspective and independent with age. The JPI showed students becoming more intellectually curious, inquisitive, and spirited. In both samples growth occurred in work methods, study habits, attitude toward teachers, acceptance of educational ideals, and overall study orientation. These findings suggest that counselors should concentrate on services to freshmen, since they experience the most social, emotional, and academic change as they assimilate and accommodate to the college milieu. (BL)