The SAT I is designed to predict first-year college grades - it is not validated to predict grades beyond the freshman year, graduation rates, pursuit of a graduate degree, or for placement or advising purposes. However, according to research done by the tests' manufacturers, class rank and/or high school grades are still both better predictors of college performance than the SAT I.
The poor predictive ability of the SAT I becomes particularly apparent when considering the college performance of females. Longstanding gaps in scores between males and females of all races show that females on average score 35-40 points lower than males on the SAT I, but receive better high school and college grades. In other words, the test consistently under-predicts the performance of females in college while over-predicting that of males.
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