The present study involved a comparison among a variety of measures in predicting first-year grade-point average (GPA) in graduate school in Psychology at the University of Illinois. The predictors included standard ability measures such as the Graduate Record Examination, biographical characteristics, peer ratings on intellective and personological variables, and scales from the Opinion, Attitude, and Interest Survey. The samples involved forty-six psychology first-year students at the University of Illinois in 1965 and fifty-eight students in 1966. Results indicated that among ail predictors only the peer ratings demonstrated predictive validity of first-year grades.
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Wiggins et al. (1969) studied this question.