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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 American World Role Subscale, Grade 8 U.S. History National Assessment, by Item and Block: 2014
| Block | Item | NAEP ID | aj | bj | cj | dj1 | dj2 | dj3 | dj4 | dj5 |
|---|---|---|---|---|---|---|---|---|---|---|
|
† Not applicable; c parameters are not estimated for the two-parameter logistic model or generalized partial credit models, and d parameters are not estimated for two-parameter or three-parameter 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 is assumed to be exactly zero and is not estimated for items scaled with the two-parameter logistic model. For item j, dji may not sum to zero because of rounding. In 2014, grades 4 and 12 were not assessed. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2014 U.S. History Assessment. | ||||||||||
| H3 | 7 | H036001 | 1.19 | 0.45 | .37 | † | † | † | † | † |
| 8 | H036101 | 0.80 | -0.81 | † | † | † | † | † | † | |
| 13 | H036501 | 1.28 | 0.23 | .31 | † | † | † | † | † | |
| H4 | 13 | H060001 | 1.02 | 1.93 | .22 | † | † | † | † | † |
| H5 | 8 | H038301 | 0.66 | 0.40 | † | -0.52 | 0.52 | † | † | † |
| 12 | H038701 | 0.46 | -1.12 | .30 | † | † | † | † | † | |
| 13 | H038702 | 0.67 | 1.67 | † | 1.02 | -1.02 | † | † | † | |
| H6 | 1 | H068701 | 0.66 | -0.27 | .30 | † | † | † | † | † |
| 2 | H068801 | 0.60 | 1.52 | .39 | † | † | † | † | † | |
| 9 | H069501 | 0.50 | 1.43 | .34 | † | † | † | † | † | |
| 14 | H070001 | 0.56 | 0.65 | † | † | † | † | † | † | |
| 16 | H070201 | 2.06 | 1.09 | .17 | † | † | † | † | † | |
| H7 | 2 | H077301 | 0.97 | 1.72 | .31 | † | † | † | † | † |
| 4 | H088201 | 1.27 | -0.12 | .36 | † | † | † | † | † | |
| 9 | H090201 | 0.56 | 1.22 | † | -0.38 | 0.27 | 0.11 | † | † | |
| 14 | H089201 | 0.70 | 3.72 | .39 | † | † | † | † | † | |
| 15 | H087901 | 1.28 | -0.16 | .27 | † | † | † | † | † | |
| 16 | H089501 | 0.81 | 0.38 | .32 | † | † | † | † | † | |
| H8 | 5 | H085001 | 0.84 | 0.18 | .27 | † | † | † | † | † |
| 7 | H090101 | 0.67 | 1.32 | .25 | † | † | † | † | † | |
| 14 | H083901 | 0.90 | 0.65 | .26 | † | † | † | † | † | |
| 17 | H086301 | 0.94 | 0.09 | .32 | † | † | † | † | † | |
| H9 | 3 | H097901 | 0.75 | -0.27 | † | 0.33 | -0.33 | † | † | † |
| 8 | H083401 | 0.86 | 0.18 | .27 | † | † | † | † | † | |
| 11 | H083701 | 0.98 | 0.96 | .31 | † | † | † | † | † | |
| 16 | H084601 | 1.30 | 1.21 | .21 | † | † | † | † | † | |
| 17 | H087701 | 1.39 | 1.49 | .31 | † | † | † | † | † | |
| H10 | 1 | H041901 | 1.35 | 1.52 | .29 | † | † | † | † | † |
| 5 | H042201 | 0.92 | 1.86 | † | 0.54 | -0.54 | † | † | † | |
| 6 | H042301 | 0.70 | 1.83 | .23 | † | † | † | † | † | |
| 7 | H042401 | 0.76 | 1.94 | .23 | † | † | † | † | † | |
| 15 | H0429CL | 0.34 | 0.13 | † | 0.56 | 0.07 | -0.63 | † | † | |
Last updated 30 August 2021 (ML)