
Accession Number : AD0661808
Title : ESTIMATING TRUESCORE 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 truescore 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