NAEP Technical DocumentationNumber of Items by Severity of Differential Item Functioning (DIF) in the Geography National Assessment

For dichotomously scored items, NAEP categorizes each item into one of three categories: "A" (items exhibiting no DIF), "B" (items exhibiting a weak indication of DIF), or "C" (items exhibiting a strong indication of DIF). A plus sign (+) indicates that items are differentially easier for the focal group (female, Black, or Hispanic students) than for the reference group (male or White students) after making an adjustment for the overall level of proficiency in the two groups; a minus sign (-) indicates that items are differentially more difficult for the focal group than for the reference group. For polytomously scored items, NAEP categorizes items into "AA," "BB," or "CC" categories and the plus or minus sign has the same interpretation as for dichotomously scored items. After reviewing "C" and "CC" items, subject area specialists decided that no items were biased, so none were deleted from the scales for this reason.

Number of dichotomously scored items, geography national assessment, by differential item functioning (DIF) category and grade: 2014

Grade	DIF category	Female/Male	Black/White	Hispanic/White
NOTE: This includes all items in the assessment (the prescaling decisions). In 2014, grades 4 and 12 were not assessed. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2014 Geography Assessment.
8	C-	1	1	0
	B-	3	3	2
	A	85	79	81
	B+	1	7	6
	C+	0	0	1

 

Number of polytomously scored items, geography national assessment, by differential item functioning (DIF) category and grade: 2014

Grade	DIF category	Female/Male	Black/White	Hispanic/White
NOTE: This includes all items in the assessment (the prescaling decisions). In 2014, grades 4 and 12 were not assessed. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2014 Geography Assessment.
8	CC-	0	1	0
	BB-	1	1	1
	AA	29	29	29
	BB+	3	0	3
	CC+	0	2	0

 

Items identified as "C" items in at least one comparison, geography national assessment, by block, subscale, and grade: 2014

Grade	Block	Subscale	Item	Comparison	Group favored
NOTE: In 2014, grades 4 and 12 were not assessed. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2014 Geography Assessment.
8	G4	Environment and society	G033401	Black/White	White
	G5	Space and place	G047001	Female/Male	Male
	G8	Spatial dynamics and connections	G049101	Hispanic/White	Hispanic

 

Items identified as "CC" items in at least one comparison, geography national assessment, by block, subscale, and grade: 2014

Grade	Block	Subscale	Item	Comparison	Group favored
NOTE: In 2014, grades 4 and 12 were not assessed. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2014 Geography Assessment.
8	G3	Space and place	G014401	Black/White	White
	G4	Spatial dynamics and connections	G033501	Black/White	Black
	G7	Space and place	G051601	Black/White	Black

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