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Direct linkHu, Huiqin; Rogers, W. Todd; Vukmirovic, Zarko – Applied Psychological Measurement, 2008
Common items with inconsistent b-parameter estimates may have a serious impact on item response theory (IRT)--based equating results. To find a better way to deal with the outlier common items with inconsistent b-parameters, the current study investigated the comparability of 10 variations of four IRT-based equating methods (i.e., concurrent…
Descriptors: Item Response Theory, Item Analysis, Computer Simulation, Equated Scores
Peer reviewedZeng, Lingjia – Applied Psychological Measurement, 1995
The effects of different degrees of smoothing on results of equipercentile equating in random groups design using a postsmoothing method based on cubic splines were investigated, and a computer-based procedure was introduced for selecting a desirable degree of smoothing. Results suggest that no particular degree of smoothing was always optimal.…
Descriptors: Computer Simulation, Computer Software, Equated Scores, Research Methodology
