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Miller, Tess; Chahine, Saad; Childs, Ruth A. – Practical Assessment, Research & Evaluation, 2010
This study illustrates the use of differential item functioning (DIF) and differential step functioning (DSF) analyses to detect differences in item difficulty that are related to experiences of examinees, such as their teachers' instructional practices, that are relevant to the knowledge, skill, or ability the test is intended to measure. This…
Descriptors: Test Bias, Difficulty Level, Test Items, Mathematics Tests