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 4 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. |
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| H3 | 1 | H065501 | 0.95 | 1.04 | 0.29 | † | † | † | † | † |
| H4 | 2 | H054201 | 0.45 | -0.75 | 0.23 | † | † | † | † | † |
| 3 | H054301 | 0.84 | -1.04 | † | † | † | † | † | † | |
| 4 | H054401 | 0.70 | -0.39 | 0.25 | † | † | † | † | † | |
| 5 | H054501 | 1.00 | 1.32 | 0.27 | † | † | † | † | † | |
| 6 | H054601 | 0.40 | 0.99 | † | 1.68 | -1.68 | † | † | † | |
| 10 | H055001 | 1.26 | 0.42 | 0.27 | † | † | † | † | † | |
| 11 | H055101 | 1.07 | 0.84 | 0.23 | † | † | † | † | † | |
| 12 | H055201 | 1.07 | 0.37 | 0.28 | † | † | † | † | † | |
| 13 | H055301 | 0.58 | 1.21 | † | 0.57 | -0.57 | † | † | † | |
| H5 | 11 | H056701 | 0.37 | -0.48 | 0.26 | † | † | † | † | † |
| 12 | H056801 | 0.49 | -0.33 | † | 2.25 | -2.25 | † | † | † | |
| 15 | H057101 | 0.63 | -0.17 | 0.23 | † | † | † | † | † | |
| H6 | 4 | H067401 | 0.59 | 0.47 | † | 0.97 | -0.97 | † | † | † |
| 8 | H067801 | 1.07 | 0.56 | 0.23 | † | † | † | † | † | |
| 13 | H068301 | 0.53 | 1.56 | † | 0.16 | -0.16 | † | † | † | |
| H7 | 1 | H077101 | 0.95 | -0.23 | 0.33 | † | † | † | † | † |
| 8 | H078901 | 0.64 | 0.63 | 0.29 | † | † | † | † | † | |
| 9 | H078903 | 0.50 | 0.29 | † | 0.96 | -0.96 | † | † | † | |
| H8 | 9 | H080401 | 0.41 | -0.73 | † | 0.05 | 0.58 | -0.63 | † | † |
| 14 | H078201 | 0.50 | 1.16 | † | 0.62 | -0.62 | † | † | † | |
| 16 | H097701 | 1.22 | 0.59 | 0.26 | † | † | † | † | † | |
Last updated 01 July 2014 (GF)