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Direct linkMiller, 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
Childs, Ruth A.; Ram, Anita; Xu, Yunmei – Practical Assessment, Research & Evaluation, 2009
Dual scaling, a variation of multidimensional scaling, can reveal the dimensions underlying scores, such as raters' judgments. This study illustrates the use of a dual scaling analysis with semi-structured interviews of raters to investigate the differences among the raters as captured by the dimensions. Thirty applications to a one-year…
Descriptors: Teacher Education Programs, Interviews, Multidimensional Scaling, Teacher Educators
