A number of studies have been reported dealing with the temporal stability during adolescence of the variables on the Kuder Preference Record. Form C (Herzberg & Bouton, 1954; Reid, 1952; Rosenberg, 1953), and on the Strong Vocational Interest Blank for Men (Canning, 1941; Darley & Hagenah, 1955). Typically the index used was the product-moment correlation coefficient, and the reported values usually exceed .60, with some reaching the high 80's.