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Direct linkZimmerman, Donald W. – Journal of Educational Measurement, 2009
This study was an investigation of the relation between the reliability of difference scores, considered as a parameter characterizing a population of examinees, and the reliability estimates obtained from random samples from the population. The parameters in familiar equations for the reliability of difference scores were redefined in such a way…
Descriptors: Computer Simulation, Reliability, Population Groups, Scores
Liu, Jinghua; Low, Albert C. – Journal of Educational Measurement, 2008
This study applied kernel equating (KE) in two scenarios: equating to a very similar population and equating to a very different population, referred to as a distant population, using SAT[R] data. The KE results were compared to the results obtained from analogous traditional equating methods in both scenarios. The results indicate that KE results…
Descriptors: Equated Scores, Population Groups, Differences, Comparative Analysis
von Davier, Alina A.; Holland, Paul W.; Thayer, Dorothy T. – Journal of Educational Measurement, 2004
The Non-Equivalent-groups Anchor Test (NEAT) design has been in wide use since at least the early 1940s. It involves two populations of test takers, P and Q, and makes use of an anchor test to link them. Two linking methods used for NEAT designs are those (a) based on chain equating and (b) that use the anchor test to post-stratify the…
Descriptors: Equated Scores, Evaluation Research, Comparative Testing, Population Groups
