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NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Assessment IRT Parameters → Reading Assessment IRT Parameters → IRT Parameters for Items in the Informational Subscale, Grade 8 Reading Combined National and State Assessment, by Block and Item: 2022
NAEP Technical DocumentationIRT Parameters for Items in the Informational Subscale, Grade 8 Reading Combined National and State Assessment, by Block and Item: 2022
| Item | NAEP ID | a | b | c | d | d | d | |
|---|---|---|---|---|---|---|---|---|
| Not applicable; c parameters are not estimated for the two-parameter logistic or generalized partial credit models, and d parameters are not estimated for the two-parameter or three-parameter logistic models. | ||||||||
| For item j, a represents the discriminatory power of the item, b represents a location parameter related to item difficulty, c represents the guessing parameter, and d represents the category threshold parameter for category i. The c parameter value is assumed to be exactly zero and is not estimated for items scaled with the two-parameter logistic model. For item j, d may not sum to zero because of rounding. | ||||||||
| U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2022 Reading Assessment. | ||||||||
| Block R3 | ||||||||
| 1 | R060101 | 0.624 | -0.455 | 0.262 | ||||
| 2 | R060102 | 1.024 | -0.470 | 0.306 | ||||
| 3 | R060103 | 0.825 | -0.592 | |||||
| 4 | R060104 | 0.921 | -0.633 | 0.251 | ||||
| 5 | R060105 | 1.025 | -0.436 | |||||
| 6 | R060106 | 0.840 | -0.086 | 0.146 | ||||
| 7 | R060107 | 1.323 | 0.507 | 0.252 | ||||
| 8 | R060108 | 0.646 | 0.302 | 0.495 | 0.238 | -0.733 | ||
| 9 | R060109 | 0.768 | 0.478 | 0.083 | ||||
| 10 | R060110 | 0.731 | 0.084 | 0.191 | ||||
| Block R4 | ||||||||
| 1 | R080001 | 1.553 | -0.004 | 0.427 | ||||
| 2 | R080002 | 1.100 | 0.739 | 0.225 | ||||
| 3 | R080003 | 0.692 | -0.132 | 0.189 | ||||
| 4 | R080004 | 1.498 | 0.146 | 0.249 | ||||
| 5 | R080005 | 0.844 | 0.491 | 0.272 | -0.048 | -0.224 | ||
| 6 | R080006 | 1.365 | 0.193 | 0.152 | ||||
| 7 | R080007 | 0.747 | 0.916 | |||||
| 8 | R080008 | 0.648 | 2.343 | 0.357 | ||||
| 9 | R080009 | 0.621 | 0.788 | 0.724 | -0.724 | |||
| 10 | R080010 | 0.822 | 0.428 | 0.662 | -0.662 | |||
| Block R7 | ||||||||
| 1 | R058801 | 1.546 | -0.507 | 0.476 | ||||
| 2 | R058802 | 1.585 | -1.275 | 0.277 | ||||
| 3 | R058803 | 2.272 | -0.708 | 0.306 | ||||
| 4 | R058804 | 0.983 | -0.814 | 0.202 | ||||
| 5 | R058805 | 0.749 | -1.771 | |||||
| 6 | R058806 | 0.657 | 0.171 | 0.318 | ||||
| 7 | R058807 | 0.545 | -0.749 | 0.854 | 0.510 | -1.364 | ||
| 8 | R058808 | 0.930 | -0.875 | 0.270 | ||||
| 9 | R058809 | 0.793 | -0.370 | 0.213 | ||||
| 10 | R058810 | 0.597 | -0.886 | 0.715 | -0.715 | |||
| Block R11 | ||||||||
| 1 | R091701 | 0.880 | 0.480 | 0.238 | ||||
| 2 | R091702 | 0.903 | -0.213 | 0.247 | ||||
| 3 | R091703 | 0.545 | -0.513 | -0.218 | 0.218 | |||
| 4 | R091704 | 0.526 | -0.697 | 0.709 | -0.709 | |||
| 5 | R091705 | 0.841 | -0.165 | 0.262 | ||||
| 6 | R091706 | 0.627 | 0.529 | 0.515 | -0.515 | |||
| 7 | R091707 | 0.872 | 0.996 | 0.604 | -0.348 | -0.256 | ||
| 8 | R091708 | 1.147 | -0.011 | 0.185 | ||||
| 9 | R091709 | 1.267 | 0.865 | 0.225 | ||||
| 10 | R091710 | 1.076 | 0.236 | 0.298 | ||||
| Block R12 | ||||||||
| 1 | R061001 | 1.152 | -1.125 | 0.131 | ||||
| 2 | R061002 | 0.992 | -0.378 | 0.312 | ||||
| 3 | R061003 | 0.846 | 0.076 | 0.566 | -0.566 | |||
| 4 | R061004 | 0.872 | -0.948 | |||||
| 5 | R061005 | 0.529 | -0.330 | 0.227 | ||||
| 6 | R061006 | 0.810 | -0.189 | |||||
| 7 | R061007 | 0.573 | 0.468 | 1.176 | -0.930 | -0.246 | ||
| 8 | R061008 | 0.917 | -0.301 | 0.204 | ||||
| 9 | R061009 | 0.969 | -0.946 | 0.166 | ||||
| 10 | R061010 | 0.670 | 0.447 | 1.029 | -1.029 | |||
| Block R14 | ||||||||
| 1 | R092301 | 0.898 | -1.044 | 0.326 | ||||
| 2 | R092302 | 0.621 | -1.384 | |||||
| 3 | R092303 | 0.328 | 1.237 | 0.258 | ||||
| 4 | R092304 | 0.791 | 0.478 | |||||
| 5 | R092305 | 0.764 | 1.292 | 0.073 | ||||
| 6 | R092306 | 0.500 | -0.873 | 0.689 | -0.689 | |||
| 7 | R0923MS | 0.443 | 1.115 | 0.018 | -0.018 | |||
| 8 | R092308 | 0.537 | -0.672 | 0.895 | -0.895 | |||
| Block R17 | ||||||||
| 1 | R090201 | 0.379 | -0.934 | 0.065 | ||||
| 2 | R090202 | 1.430 | 0.951 | 0.320 | ||||
| 3 | R090203 | 0.893 | -1.207 | 0.235 | ||||
| 4 | R0902M4 | 0.797 | -0.263 | |||||
| 5 | R090205 | 0.553 | 0.807 | 1.237 | -1.237 | |||
| 6 | R090206 | 1.144 | -0.212 | 0.151 | ||||
| 7 | R0902M7 | 0.850 | 0.284 | 0.208 | -0.208 | |||
| 8 | R090208 | 0.450 | -0.264 | 0.559 | -0.308 | -0.251 | ||
| 9 | R090210 | 1.203 | -0.785 | 0.337 | ||||
| 10 | R090211 | 0.837 | 0.713 | 0.986 | -0.986 | |||
Last updated 24 July 2024 (SK)