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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 Literary Subscale, Grade 4 Reading Combined National and State Assessment, by Block and Item: 2022
NAEP Technical DocumentationIRT Parameters for Items in the Literary Subscale, Grade 4 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 R1 | ||||||||
| 1 | R068901 | 1.178 | -0.053 | 0.233 | ||||
| 2 | R068902 | 1.075 | 1.374 | 0.288 | ||||
| 3 | R068903 | 0.840 | -0.506 | 0.130 | ||||
| 4 | R068904 | 0.697 | -0.114 | |||||
| 5 | R068905 | 1.312 | -0.577 | 0.346 | ||||
| 6 | R068906 | 1.144 | -1.222 | 0.128 | ||||
| 7 | R068907 | 0.643 | 0.744 | 1.509 | 0.524 | -2.032 | ||
| 8 | R068908 | 1.372 | -0.695 | 0.102 | ||||
| 9 | R068909 | 0.620 | -0.737 | 0.124 | ||||
| 10 | R068910 | 0.509 | -0.229 | 0.380 | -0.380 | |||
| 11 | R068911 | 0.605 | -1.363 | 0.113 | ||||
| Block R2 | ||||||||
| 1 | R057801 | 1.076 | -0.629 | 0.216 | ||||
| 2 | R057802 | 1.038 | -0.172 | 0.202 | ||||
| 4 | R057804 | 1.051 | 0.058 | 0.262 | ||||
| 5 | R057805 | 0.541 | -0.128 | 0.232 | ||||
| 6 | R057806 | 0.699 | 0.458 | 1.757 | -0.011 | -1.746 | ||
| 7 | R057807 | 0.895 | -0.539 | |||||
| 8 | R057808 | 0.722 | 0.852 | 0.184 | ||||
| 9 | R057809 | 0.681 | 1.007 | 1.155 | -1.155 | |||
| Block R3 | ||||||||
| 1 | R079301 | 2.121 | 0.426 | 0.366 | ||||
| 2 | R079302 | 2.110 | -0.027 | 0.278 | ||||
| 3 | R079303 | 2.010 | -0.318 | 0.285 | ||||
| 4 | R079304 | 1.129 | -0.083 | 0.204 | ||||
| 5 | R079305 | 1.558 | 1.010 | 0.134 | ||||
| 6 | R079306 | 0.869 | 0.414 | 0.471 | -0.471 | |||
| 7 | R079307 | 0.593 | 0.770 | 0.721 | 0.760 | -1.481 | ||
| 8 | R079309 | 0.647 | 0.970 | -0.018 | 0.018 | |||
| 9 | R079310 | 2.522 | 0.226 | 0.227 | ||||
| 10 | R079312 | 1.349 | 0.636 | 0.289 | ||||
| Block R5 | ||||||||
| 1 | R084501 | 1.079 | 0.391 | 0.208 | ||||
| 2 | R084502 | 1.061 | 1.374 | 1.306 | -1.306 | |||
| 3 | R084503 | 1.069 | -0.390 | 0.263 | ||||
| 4 | R0845MS | 0.715 | -0.780 | 1.157 | -0.367 | -0.790 | ||
| 5 | R084505 | 1.260 | 1.130 | 0.113 | ||||
| 6 | R084506 | 0.627 | -0.107 | 0.186 | ||||
| 7 | R084507 | 0.929 | -0.155 | |||||
| 8 | R084508 | 0.710 | 0.968 | 0.782 | 0.348 | -1.130 | ||
| 9 | R084510 | 0.959 | 0.053 | 0.287 | ||||
| Block R6 | ||||||||
| 1 | R058601 | 1.015 | 0.228 | 0.115 | ||||
| 2 | R058602 | 0.678 | 0.769 | 0.656 | -0.656 | |||
| 3 | R058603 | 1.319 | 0.316 | 0.393 | ||||
| 4 | R058604 | 1.418 | 0.368 | 0.268 | ||||
| 5 | R058605 | 1.328 | 0.801 | 0.221 | ||||
| 6 | R058606 | 0.822 | 1.268 | 0.573 | -0.573 | |||
| 7 | R058607 | 1.326 | 0.461 | 0.300 | ||||
| 8 | R058608 | 0.788 | 1.423 | 1.319 | -0.466 | -0.853 | ||
| 9 | R058609 | 1.105 | 0.814 | 0.157 | ||||
| 10 | R058610 | 1.122 | 0.230 | 0.289 | ||||
| Block R15 | ||||||||
| 1 | R086501 | 0.675 | 0.995 | 0.573 | -0.573 | |||
| 2 | R086502 | 0.818 | -0.524 | 0.156 | ||||
| 3 | R0865M4 | 1.008 | 0.972 | |||||
| 4 | R086505 | 1.148 | 0.056 | 0.324 | ||||
| 5 | R086506 | 0.997 | -0.392 | 0.128 | ||||
| 6 | R086507 | 2.274 | -0.046 | 0.184 | ||||
| 7 | R086508 | 1.738 | -0.041 | 0.236 | ||||
| 8 | R086509 | 1.853 | -0.376 | 0.270 | ||||
| 9 | R086511 | 0.709 | 0.613 | 1.126 | -1.126 | |||
| 10 | R086512 | 1.388 | 0.384 | 0.228 | ||||
| 11 | R086514 | 0.646 | 1.220 | 0.501 | 0.801 | -1.302 | ||
Last updated 24 July 2024 (SK)