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Number of Items by Severity of Differential Item Functioning (DIF), Mathematics Combined National and State Assessment: 2019
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 scale for this reason.
Number of dichotomously scored items, mathematics combined national and state assessment, by differential item functioning (DIF) group, grade, and DIF category: 2019
DIF category
Female/Male
Black/White
Hispanic/White
This includes all items in the assessment (the prescaling decisions).
U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2019 Mathematics Assessment.
Grade 4
C-
1
3
1
B-
7
4
4
A
173
175
180
B+
4
3
0
C+
0
0
0
Grade 8
C-
2
1
0
B-
6
8
2
A
165
165
175
B+
3
3
0
C+
1
0
0
Number of dichotomously scored items, mathematics DBA national assessment, by differential item functioning (DIF) group, grade, and DIF category: 2019
DIF category
Female/Male
Black/White
Hispanic/White
DBA = Digitally based assessment. This includes all items in the assessment (the prescaling decisions).
U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2019 Mathematics Assessment.
Grade 12
C-
0
0
0
B-
6
4
2
A
125
125
127
B+
2
5
5
C+
1
0
0
Number of dichotomously scored items, mathematics PBA national assessment, by differential item functioning (DIF) group, grade, and DIF category: 2019
DIF category
Female/Male
Black/White
Hispanic/White
PBA = Paper-based assessment. This includes all items in the assessment (the prescaling decisions).
U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2019 Mathematics Assessment.
Grade 12
C-
2
1
0
B-
11
3
3
A
134
135
134
B+
1
7
11
C+
0
2
0
Number of polytomously scored items, mathematics combined national and state assessment, by differential item functioning (DIF) group, grade, and DIF category: 2019
DIF category
Female/Male
Black/White
Hispanic/White
This includes all items in the assessment (the prescaling decisions).
U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2019 Mathematics Assessment.
Grade 4
CC-
0
0
0
BB-
0
0
0
AA
61
60
61
BB+
0
1
0
CC+
0
0
0
Grade 8
CC-
0
0
0
BB-
0
0
0
AA
64
64
65
BB+
1
1
0
CC+
0
0
0
Number of polytomously scored items, mathematics DBA national assessment, by differential item functioning (DIF) group, grade, and DIF category: 2019
DIF category
Female/Male
Black/White
Hispanic/White
DBA = Digitally based assessment. This includes all items in the assessment (the prescaling decisions).
U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2019 Mathematics Assessment.
Grade 12
CC-
0
0
0
BB-
2
1
0
AA
46
46
48
BB+
0
1
0
CC+
0
0
0
Number of polytomously scored items, mathematics PBA national assessment, by differential item functioning (DIF) group, grade, and DIF category: 2019
DIF category
Female/Male
Black/White
Hispanic/White
PBA = Paper-based assessment. This includes all items in the assessment (the prescaling decisions).
U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2019 Mathematics Assessment.
Grade 12
CC-
0
1
0
BB-
3
1
2
AA
37
40
41
BB+
3
1
0
CC+
0
0
0
Items identified as "C" items in at least one comparison, mathematics combined national and state assessment, by grade, block, and subscale: 2019
Block
Item
Subscale
Comparison
Group favored
No "CC" items were identified.
U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2019 Mathematics Assessment.
Grade 4
M1
M147801
Data analysis, statistics, and probability
Black/White, Hispanic/White
White
M2
M241701
Measurement
Black/White
White
M7
M155201
Number properties and operations
Female/Male
Male
M9
M377201
Data analysis, statistics, and probability
Black/White
White
Grade 8
M5
M223001
Number properties and operations
Female/Male
Male
M11
M251701
Number properties and operations
Female/Male
Female
M13
M3890MS
Number properties and operations
Female/Male
Male
M14
M3864MS
Geometry
Black/White
White
Items identified as "C" items in at least one comparison, mathematics DBA national assessment, by grade, block, and subscale: 2019
Block
Item
Subscale
Comparison
Group favored
DBA = Digitally based assessment. No "CC" items were identified. Since 2005, the measurement and geometry scales are combined at grade 12.
U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2019 Mathematics Assessment.
Grade 12
M5
M192801
Measurement and geometry
Female/Male
Female
Items identified as "C" items in at least one comparison, mathematics PBA national assessment, by grade, block, and subscale: 2019
Block
Item
Subscale
Comparison
Group favored
PBA = Paper-based assessment. Since 2005, the measurement and geometry scales are combined at grade 12.
U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2019 Mathematics Assessment.
