3. As noted in the module overview, in order to perform IRT DIF procedures, item parameters need...
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3. As noted in the module overview, in order to perform IRT DIF procedures, item parameters need to be linked or equated across groups.
Do you think such equating would also be required if other statistics, such as ETS’s Delta procedure, are used to establish DIF?
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Related Book For 
Measurement Theory In Action
ISBN: 9780415644792
2nd Edition
Authors: David Whitney, Kenneth S Shultz, Michael J Zickar
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