The objective of this paper was to assess the extent of the relationship between Nelson-Denny Reading Test (NDRT) scores and introductory psychology examination scores. Tests were administered to subjects from selected sections of an introductory psychology course. Measures were taken over a four-semester period. The median correlation between the Nelson-Denny scores and each of the two criterion measures (first unit examination and total number of points earned during the semester—Semester Point Total) was 0.56 (significant at the 0.01 level). When standardized aptitude measures are not available, the NDRT would appear to be a useful predictor of performance in an introductory psychology class. EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT 1980,40 THERE seems to be little doubt that the major intellectually-oriented standardized aptitude tests are useful predictors of college grade point average (GPA) (Aleamoni and Oboler, 1978;Lavin, 1965). Correlations between well-known scholastic aptitude tests and GPA tend to cluster around 0.50. Scores on these measures often correlate more highly with grades in individual courses than with the over-all GPA (Passons, 1967). Zimmerman, Wise, and Smith (1974) used the American College Testing (ACT) Program tests (American College Testing Program, 1973) to predict grades in introductory psychology classes with some success. They reported correlations varying from 0.36 to 0.53 for the ACT subtests and one of 0.56 for the ACT Total measure.