Accession Number : AD0661808

Title :   ESTIMATING TRUE-SCORE DISTRIBUTIONS IN PSYCHOLOGICAL TESTING (AN EMPIRICAL BAYES ESTIMATION PROBLEM),

Corporate Author : EDUCATIONAL TESTING SERVICE PRINCETON N J

Personal Author(s) : Lord,Frederic M.

Report Date : NOV 1967

Pagination or Media Count : 58

Abstract : The following problem is considered: Given that the frequency distribution of the errors of measurement is known, determine or estimate the distribution of true scores from the distribution of observed scores for a group of examinees. Typically this problem does not have a unique solution. However, if the true-score distribution is 'smooth,' then any two smooth solutions to the problem will differ little from each other. Methods for finding smooth solutions are developed (a) for a population and (b) for a sample of examinees. The results of a number of tryouts on actual test data are summarized. (Author)

Descriptors :   (*PSYCHOLOGICAL TESTS, STATISTICAL ANALYSIS), (*UNCERTAINTY, PSYCHOLOGICAL TESTS), (*INTELLIGENCE TESTS, THEORY), MATHEMATICAL MODELS, STATISTICAL TESTS, APPROXIMATION(MATHEMATICS), INTEGRAL EQUATIONS, SAMPLING, ACCURACY

Subject Categories : Psychology
      Statistics and Probability

Distribution Statement : APPROVED FOR PUBLIC RELEASE