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NAEP Analysis and Scaling → Estimation of NAEP Score Scales → Treatment of Items in NAEP to Avoid Violations of Assumptions → Results of NAEP DIF Analyses Results of NAEP DIF AnalysesDifferential item functioning (DIF) analyses are completed the first time an item is included in a NAEP assessment. Three comparisons are made: Male versus female students, White versus Black students, and White versus Hispanic students. Items that exhibit a strong indication of DIF are labeled "C" for dichotomous items and "CC" for polytomous items. Numbers of new items classified in each DIF category using the Mantel-Haenszel procedure are provided, along with information about items categorized as "C" or" CC."
Last updated 13 June 2008 (MH) |
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