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Equated Scores2
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Gustafsson, Jan-Eric1
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A Program for Estimating the Relative Efficiency of Tests at Various Ability Levels, for Equating True Scores, and for Predicting Bivariate Distributions of Observed Scores.
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Stocking, Martha; And Others – 1973
For two tests measuring the same trait, the program, BIV20, equates the scores using the two True score distributions estimated by the univariate method 20 program (see Wingersky, Lees, Lennon, and Lord, 1969) and, with these equated true scores and their distributions, estimates the bivariate distribution scores and the relative efficiency of the…
Descriptors: Computer Programs, Equated Scores, Statistical Analysis, Test Reliability
The Rasch Model for Dichotomous Items: Theory, Applications and a Computer Program. No. 63.
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Gustafsson, Jan-Eric – 1977
The Rasch model for test analysis is described and compared with two-parameter and three-parameter latent-trait models. Conditional maximum likelihood equations for estimating item parameters are derived, and estimates of person parameters are described together with their confidence intervals. Goodness of fit tests are discussed, including a…
Descriptors: Adaptive Testing, Computer Programs, Equated Scores, Error of Measurement