High ability men, who were winners of National Merit Scholarships in 1966, were used to study the capacity of precollege Strong Vocational Interest Blanks (SVIB) to predict major and career choices at the end of college. Criterion groups contained 1,031 men in 16 major fields and 780 men planning to enter 10 career fields. SVIB Occupational and Basic Scales were compared, using both univariate and discriminant function predictive methods. For each of the four predictor-criterion conditions a moderately high level of prediction was possible. The Basic Scales, as a predictor set, performed as well as the Occupational Scales. To indicate the interest similarities of scholars who entered different career fields, criterion groups were plotted in the reduced discriminant space. The results support the use of the Basic Scales in research and counseling and exemplify the utility of the discriminant function method for the validation of interest measures. (Author)