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ArtikelA Method for Estimating Classification Consistency Indices for Two Equated Forms  
Oleh: Yi, Hyun Sook ; Kim, Seonghoon ; Brennan, Robert L.
Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Applied Psychological Measurement vol. 31 no. 4 (Jul. 2007), page 275-291.
Topik: classification consistency; percentage agreement; kappa; equating; cut scores; licensure and certification
Fulltext: 275.pdf (250.86KB)
Isi artikelLarge-scale testing programs involving classification decisions typically have multiple forms available and conduct equating to ensure cut-score comparability across forms. A test developer might be interested in the extent to which an examinee who happens to take a particular form would have a consistent classification decision if he or she had taken an equated alternate form. In this article, classification consistency indices directly applicable to equating contexts are introduced, and procedures for estimating these indices are presented under three equating designs: the single-group design, the random-groups design, and the common-item nonequivalent-groups design. Two families of psychometric models (item response theory models and beta-binomial models) are introduced, focusing on the procedures for estimating conditional score distributions and ability distributions. Two empirical analyses are provided to illustrate the use of the methodology under the common-item nonequivalent-groups design and the randomgroups design, using item response theory models and beta-binomial models.
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