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Direct linkFidalgo, Angel M. – Applied Psychological Measurement, 2011
Mantel-Haenszel (MH) methods constitute one of the most popular nonparametric differential item functioning (DIF) detection procedures. GMHDIF has been developed to provide an easy-to-use program for conducting DIF analyses. Some of the advantages of this program are that (a) it performs two-stage DIF analyses in multiple groups simultaneously;…
Descriptors: Test Bias, Computer Software, Statistics, Comparative Analysis
Michaelides, Michalis P. – Applied Psychological Measurement, 2010
The delta-plot method (Angoff, 1972) is a graphical technique used in the context of test equating for identifying common items with aberrant changes in their item difficulties across administrations or alternate forms. This brief research report explores the effects on equated aggregate scores when delta-plot outliers are either retained in or…
Descriptors: Test Items, Behavior Problems, Measurement, Mathematics Instruction
