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Recognition tests are ubiquitous in the study of cognition. A simple index of recognition with desirable properties is the proportion R of targets preferred to distractors. The estimation of R by either a rating or a ranking method is straightforward. No distributional assumptions are involved. Three experiments are described in which estimates derived by the two methods were found to be close. The rating method is potentially subject to a bias. A preliminary account is given of calculations which suggest that the bias is small provided at least four rating categories are used. [ABSTRACT FROM AUTHOR]

The article presents a study which sought to relate scores obtained early in high school, the Differential Aptitude Tests (DAT), with the later academic success in college. The study has noted that the scores on the DAT obtained at the high school freshman level offer the high school counselor useful information in assessing the advisability of higher education for the student. It has showed that certain of the tests, specially those involving verbal and numerical skills, were better predictors of college success than others. This study approaches the problem of prediction of general college success and success in different college curricula longitudinally.