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Direct linkKeiffer, Elizabeth Ann – ProQuest LLC, 2011
A differential item functioning (DIF) simulation study was conducted to explore the type and level of impact that contamination had on type I error and power rates in DIF analyses when the suspect item favored the same or opposite group as the DIF items in the matching subtest. Type I error and power rates were displayed separately for the…
Descriptors: Test Items, Sample Size, Simulation, Identification
