Examining The Measurement Quality of Tests Containing Differentially Functioning Items : Do Biased Items Result in Poor Measurement ?  

Oleh:

Reith, Janet ; Roznowski, Mary

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Educational and Psychological Measurement vol. 59 no. 2 (1999), page 248-269.
Topik: MEASUREMENTS; tests; quality
Fulltext: 248.pdf (124.31KB)

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Perpustakaan Pusat (Semanggi) Nomor Panggil: EE30.3 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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This study investigated effects of retaining test items manifesting differntial item functioning (DIF) on aspects of the measurement quality and validity of that test's scores. DIF was evaluated using the mantel - haenszel procedure, which allows one to detect items that function differently in two gropus of examinees at constant levels of the trait. Multiple composites of DIF and non - DIF containing items were created to examine the impact of DIF on the measurement, validity, and predictive relations involving those composites. Criteria used were the american college testing composite, the scholastic aptitude test (SAT) verbal (SATV), quantitative (SATQ), composite (SATC) and grade point average rank percentile. Results indicate measurement quality of test is not seriously degraded when items manifesting DIF are retained, even when number of items in the compared composite has been controlled. Implications of results are discussed within the framework of multiple determinants of item responses.

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