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Download full textLivingston, Samuel A.; Chen, Haiwen H. – ETS Research Report Series, 2015
Quantitative information about test score reliability can be presented in terms of the distribution of equated scores on an alternate form of the test for test takers with a given score on the form taken. In this paper, we describe a procedure for estimating that distribution, for any specified score on the test form taken, by estimating the joint…
Descriptors: Scores, Statistical Distributions, Research Reports, Equated Scores
Livingston, Samuel A. – ETS Research Report Series, 2014
In this study, I investigated 2 procedures intended to create test-taker groups of equal ability by poststratifying on a composite variable created from demographic information. In one procedure, the stratifying variable was the composite variable that best predicted the test score. In the other procedure, the stratifying variable was the…
Descriptors: Demography, Equated Scores, Cluster Grouping, Ability Grouping
