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Kim, Sooyeon; von Davier, Alina A.; Haberman, Shelby – ETS Research Report Series, 2006
This study addresses the sample error and linking bias that occur with small and unrepresentative samples in a non-equivalent groups anchor test (NEAT) design. We propose a linking method called the "synthetic function," which is a weighted average of the identity function (the trivial equating function for forms that are known to be…
Descriptors: Equated Scores, Sample Size, Test Items, Statistical Bias