NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Assessment IRT Parameters → U.S. History Assessment IRT Parameters → IRT Parameters for the Changing Role of America in the World 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. |
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| H3 | 7 | H036001 | 1.22 | 0.40 | 0.34 | † | † | † | † | † |
| 8 | H036101 | 0.96 | -0.67 | † | † | † | † | † | † | |
| 13 | H036501 | 1.19 | 0.16 | 0.29 | † | † | † | † | † | |
| H4 | 13 | H060001 | 0.94 | 2.20 | 0.23 | † | † | † | † | † |
| H5 | 8 | H038301 | 0.76 | 0.44 | † | -0.37 | 0.37 | † | † | † |
| 12 | H038701 | 0.45 | -1.11 | 0.28 | † | † | † | † | † | |
| 13 | H038702 | 0.67 | 1.62 | † | 0.91 | -0.91 | † | † | † | |
| H6 | 1 | H068701 | 0.74 | -0.14 | 0.32 | † | † | † | † | † |
| 2 | H068801 | 0.68 | 1.54 | 0.38 | † | † | † | † | † | |
| 9 | H069501 | 0.45 | 1.26 | 0.27 | † | † | † | † | † | |
| 14 | H070001 | 0.67 | 0.66 | † | † | † | † | † | † | |
| 16 | H070201 | 1.66 | 1.24 | 0.18 | † | † | † | † | † | |
| H7 | 2 | H077301 | 0.72 | 1.78 | 0.29 | † | † | † | † | † |
| 4 | H088201 | 1.06 | -0.26 | 0.30 | † | † | † | † | † | |
| 9 | H090201 | 0.66 | 1.12 | † | -0.33 | 0.33 | 0.00 | † | † | |
| 14 | H089201 | 1.20 | 2.34 | 0.43 | † | † | † | † | † | |
| 15 | H087901 | 1.17 | -0.13 | 0.24 | † | † | † | † | † | |
| 16 | H089501 | 0.69 | 0.35 | 0.27 | † | † | † | † | † | |
| H8 | 5 | H085001 | 0.83 | 0.30 | 0.24 | † | † | † | † | † |
| 7 | H090101 | 0.68 | 1.32 | 0.25 | † | † | † | † | † | |
| 14 | H083901 | 0.82 | 0.83 | 0.25 | † | † | † | † | † | |
| 17 | H086301 | 0.80 | -0.05 | 0.26 | † | † | † | † | † | |
| H9 | 3 | H097901 | 0.87 | -0.23 | † | 0.28 | -0.28 | † | † | † |
| 8 | H083401 | 0.83 | 0.16 | 0.25 | † | † | † | † | † | |
| 11 | H083701 | 0.86 | 0.98 | 0.29 | † | † | † | † | † | |
| 16 | H084601 | 0.95 | 1.39 | 0.18 | † | † | † | † | † | |
| 17 | H087701 | 1.29 | 1.39 | 0.29 | † | † | † | † | † | |
| H10 | 1 | H041901 | 1.20 | 1.66 | 0.30 | † | † | † | † | † |
| 5 | H042201 | 0.83 | 2.18 | † | 0.58 | -0.58 | † | † | † | |
| 6 | H042301 | 0.50 | 2.59 | 0.26 | † | † | † | † | † | |
| 7 | H042401 | 0.49 | 2.44 | 0.21 | † | † | † | † | † | |
| 15 | H0429CL | 0.38 | 0.08 | † | 0.55 | -0.00 | -0.55 | † | † | |
Last updated 01 July 2014 (GF)