126 university seniors were retested with the same battery of precollege aptitude measures administered four years earlier. To evaluate the effect of different educational experiences and orientations, college test performance, corrected for level of high school performance, was correlated with amount of work taken in specific course areas, grades awarded in these areas, and inventory items relating to background and educational philosophy. The results support the notion of greater differentiation in the residual intellectual growth of males. Deviations from predicted growth on the college test performance indices were relatively uncorrelated with each other and more correlated with specific experiences for males than for females. Copyright © 1969, Wiley Blackwell. All rights reserved