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NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Assessment IRT Parameters → U.S. History Assessment IRT Parameters → IRT Parameters for the Gathering of Interactions of Peoples, Cultures, and Ideas Scale, Grade 8 U.S. History National Assessment, by Item and Block: 2010
NAEP Technical DocumentationIRT parameters for the gathering of interactions of peoples, cultures, and ideas scale, grade 8 U.S. history national assessment, by item and block: 2010
Block Item NAEP ID aj bj cj dj1 dj2 dj3 dj4 dj5
† Not applicable; c parameters are not estimated for generalized partial credit models, and d parameters are not estimated for two-parameter or three-parameter logistic models.
NOTE: For item j, aj represents the discriminatory power of the item, bj represents a location parameter related to item difficulty, cj represents the guessing parameter, and dji represents the category threshold parameter for category i. The c parameter value is exactly zero for items scaled with the two-parameter logistic model. For item j, dji may not sum to zero because of rounding.
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2010 U.S. History Assessment.
H3 1 H035601 1.46 -0.23 0.32 † † † † †
2 H035602 1.32 0.33 0.24 † † † † †
9 H036201 0.51 -1.48 0.23 † † † † †
16 H036702 1.10 -1.88 0.24 † † † † †
H4 4 H059101 0.73 0.67 0.24 † † † † †
7 H059401 1.16 0.50 0.28 † † † † †
11 H059801 0.77 -0.07 † -0.29 0.29 † † †
14 H060101Z 0.71 1.35 0.32 † † † † †
16 H060301 1.05 -0.08 0.22 † † † † †
H5 10 H038501 1.10 0.87 0.25 † † † † †
11 H038601Z 0.41 2.84 † 1.24 -1.24 † † †
14 H038801 1.04 0.81 0.23 † † † † †
15 H038802 0.98 -0.10 0.28 † † † † †
16 H038901 1.11 0.71 0.22 † † † † †
H6 4 H069001 0.69 0.27 † 0.44 -0.44 † † †
5 H069101 0.72 0.71 0.37 † † † † †
6 H069201 0.48 -0.45 0.21 † † † † †
7 H069301 0.88 0.30 0.21 † † † † †
11 H069701 0.95 -0.17 0.18 † † † † †
12 H069801 0.46 0.14 † 1.45 -0.07 -1.37 † †
15 H070101 0.89 0.86 0.22 † † † † †
H7 5 H082301 0.48 0.09 † † † † † †
6 H085101 1.12 -0.22 0.21 † † † † †
7 H089901 1.94 0.41 0.24 † † † † †
8 H085201 0.63 -0.12 0.26 † † † † †
12 H085701 0.80 0.56 0.24 † † † † †
17 H086201 1.18 -0.01 0.20 † † † † †
H8 1 H081901 0.96 0.10 0.20 † † † † †
2 H088101 0.70 0.94 0.22 † † † † †
4 H083301 0.87 -0.70 0.32 † † † † †
6 H088401 0.64 0.30 † 1.18 0.10 -1.28 † †
9 H087201 1.89 1.13 0.18 † † † † †
15 H084401 0.72 1.05 0.21 † † † † †
H9 1 H083101 1.40 0.10 0.24 † † † † †
2 H084801 1.12 1.40 † 0.60 -0.60 † † †
4 H082401 1.23 0.69 0.22 † † † † †
5 H082402 0.69 0.95 † -1.23 1.23 † † †
6 H082201 0.91 1.38 0.22 † † † † †
7 H088301 0.75 1.79 † 0.60 -0.60 † † †
9 H087001 0.47 1.98 0.24 † † † † †
13 H082801 0.45 0.82 0.18 † † † † †
14 H087501 0.30 2.86 0.26 † † † † †
15 H087401 0.57 1.89 † 2.20 0.13 -2.33 † †
H11 5 H070701 0.42 1.63 † -3.32 2.05 1.28 † †
6 H070801 0.70 1.35 † 0.65 -0.65 † † †
7 H070901 1.28 0.90 0.17 † † † † †
14 H071601 0.54 1.04 † 0.50 -0.50 † † †
H12 12 H073001 0.42 0.49 † 0.22 -0.22 † † †
16 H073401 0.63 0.86 0.20 † † † † †
Last updated 01 July 2014 (GF)
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