The Academic Achievement scale introduced in the Strong Vocational Interest Blank in 1966 was said in the 1969 Manual Supplement to be more related to persistence in school than to level of performance. This proposition, the scale's predictive validities for 1-, 3-, and 4-year grade point averages, and its effectiveness with potential counseling subgroups were examined with test-retest and follow-up questionnaire data on a representative sample of 200 university men. No relationship was found to persistence or between entering first-year Academic Achievement scale scores and 4-year grade point average (r = .13). Comparisons with a scholastic ability test were unfavorable, other results ambiguous, and caution seems indicated in using the scale.In 1966 the Academic Achievement scale was added to both the men's and women's forms of the Strong Vocational Interest Blank (SVIB). The 1966 SVIB Manual said the scale was "moderately effective . . . in predicting grades and eventual educational level [p. 19]," with the expectation that it would be of direct assistance in counseling and academic advisement. In 1969 the new Manual Supplement said the scale was "more related to persistence in school than to level of performance [p. 9]," but the anticipated use of the scale apparently remained unaltered.These two descriptions of the scale are not directly contradictory but they do show a somewhat confusing shift of emphasis. Taken together, one can expect that (a) the scale will show a correlation with grades, (b) the scale will be associated with persistence in school, or the related concept, eventual educational level, and (c) the scale's relationship to persistence will be more pronounced than its relationship to grades.