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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 Economic and Technological Changes and Their Relation to Society, Ideas, and the Environment Scale, Grade 8 U.S. History National Assessment, by Item and Block: 2010
NAEP Technical DocumentationIRT parameters for the economic and technological changes and their relation to society, ideas, and the environment 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 5 H035901 0.45 -0.37 † 0.53 -0.53 † † †
6 H035902 1.12 0.72 † † † † † †
10 H036301 0.96 -0.74 0.26 † † † † †
11 H036401 0.88 0.42 0.29 † † † † †
12 H036402 0.51 0.57 † 0.99 0.21 -1.19 † †
15 H036701 0.50 -1.76 0.26 † † † † †
17 H036801 0.35 0.31 0.25 † † † † †
H4 8 H059501 0.73 0.95 0.22 † † † † †
9 H059601 0.79 -0.38 0.32 † † † † †
10 H059701 0.84 0.84 † -0.16 0.16 † † †
12 H059901 1.14 0.00 0.31 † † † † †
H5 9 H038401 2.04 1.28 0.22 † † † † †
H6 10 H069601 0.68 0.03 † 1.26 -1.26 † † †
H10 3 H042101 0.28 -0.98 0.32 † † † † †
4 H042102 1.10 1.08 0.30 † † † † †
11 H042701 0.78 -0.61 0.22 † † † † †
12 H042702 0.84 -0.50 0.20 † † † † †
16 H043001 0.42 1.79 † 0.58 -0.58 † † †
17 H043101 0.36 1.29 † 1.31 -1.31 † † †
H11 1 H070301 0.92 1.07 0.33 † † † † †
2 H070401 0.68 0.92 † 0.47 -0.47 † † †
4 H070601 1.14 0.67 0.25 † † † † †
8 H071001 0.80 0.96 † 1.81 -0.96 -0.85 † †
9 H071101 0.58 1.70 0.20 † † † † †
11 H071301 0.84 -0.90 0.28 † † † † †
12 H071401 0.84 1.60 0.35 † † † † †
13 H071501 0.11 7.41 0.21 † † † † †
15 H071701Z 1.19 0.86 0.41 † † † † †
H12 1 H071901 0.81 0.01 † 0.12 -0.12 † † †
2 H072001 1.00 0.49 0.43 † † † † †
4 H072201 1.62 0.49 0.25 † † † † †
5 H072301 1.58 0.19 0.28 † † † † †
6 H072401 0.97 0.60 0.20 † † † † †
8 H072601 0.77 2.15 † 0.96 -0.96 † † †
9 H072701 0.61 0.22 † 1.62 -1.12 -0.50 † †
10 H072801 0.92 0.43 0.27 † † † † †
11 H072901 1.20 0.88 0.21 † † † † †
13 H073101 0.68 0.46 † 0.43 -0.43 † † †
15 H073301 1.01 1.18 0.20 † † † † †
Last updated 01 July 2014 (GF)
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