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Download full textLu, Ru; Kim, Sooyeon – ETS Research Report Series, 2021
This study evaluated the impact of subgroup weighting for equating through a common-item anchor. We used data from a single test form to create two research forms for which the equating relationship was known. The results showed that equating was most accurate when the new form and reference form samples were weighted to be similar to the target…
Descriptors: Equated Scores, Weighted Scores, Raw Scores, Test Items
Kim, Sooyeon; Moses, Tim – ETS Research Report Series, 2018
The purpose of this study is to assess the impact of aberrant responses on the estimation accuracy in forced-choice format assessments. To that end, a wide range of aberrant response behaviors (e.g., fake, random, or mechanical responses) affecting upward of 20%--30% of the responses was manipulated under the multi-unidimensional pairwise…
Descriptors: Measurement Techniques, Response Style (Tests), Accuracy, Computation
