Evaluating measurement equivalence using the item response theory log-likelihood ratio (IRTLR) method to assess differential item functioning (DIF): Applications (with illustrations) to measures of physical functioning ability and general distress

Jeanne A. Teresi*, Katja Ocepek-Welikson, Marjorie Kleinman, Karon F. Cook, Paul K. Crane, Laura E. Gibbons, Leo S. Morales, Maria Orlando-Edelen, David Cella

*Corresponding author for this work

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Psychology