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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 8 Reading Combined National and State Assessment, by Block and Item: 2022
NAEP Technical DocumentationIRT Parameters for Items in the Literary 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 R1 | ||||||||
| 1 | R059601 | 0.503 | 0.146 | 0.073 | ||||
| 3 | R059603 | 0.878 | -0.847 | 0.218 | ||||
| 4 | R059604 | 0.877 | -1.076 | |||||
| 5 | R059610 | 0.707 | 0.262 | 0.720 | -0.720 | |||
| 6 | R059606 | 0.754 | -0.421 | 0.576 | -0.576 | |||
| 7 | R059605 | 0.820 | 0.709 | 0.757 | -0.757 | |||
| 8 | R059608 | 0.709 | 0.437 | 0.238 | ||||
| 9 | R059609 | 0.844 | -1.236 | 0.258 | ||||
| 10 | R059607 | 0.694 | -0.097 | 0.875 | -0.875 | |||
| Block R2 | ||||||||
| 1 | R069801 | 0.723 | -2.431 | |||||
| 2 | R069802 | 0.767 | -0.107 | 0.082 | ||||
| 3 | R069803 | 1.194 | -0.711 | 0.280 | ||||
| 4 | R069804 | 0.963 | 0.488 | 0.991 | -0.991 | |||
| 5 | R069805 | 0.569 | -0.348 | 0.189 | ||||
| 6 | R069806 | 0.640 | 0.016 | 1.811 | 0.121 | -1.933 | ||
| 7 | R069807 | 1.202 | -0.292 | 0.304 | ||||
| 8 | R069808 | 0.662 | -1.057 | 0.152 | ||||
| 9 | R069809 | 0.943 | -0.638 | 0.204 | ||||
| 10 | R069810 | 0.629 | 0.228 | 0.252 | -0.252 | |||
| Block R6 | ||||||||
| 1 | R058601 | 0.898 | -0.689 | 0.114 | ||||
| 2 | R058602 | 0.656 | -0.347 | 1.146 | -1.146 | |||
| 3 | R058603 | 1.318 | -0.663 | 0.349 | ||||
| 4 | R058604 | 1.353 | -0.705 | 0.226 | ||||
| 5 | R058605 | 0.596 | -0.755 | 0.065 | ||||
| 6 | R058606 | 0.674 | 0.063 | 0.470 | -0.470 | |||
| 7 | R058607 | 1.385 | -0.549 | 0.289 | ||||
| 8 | R058608 | 0.769 | 0.290 | 1.267 | -0.368 | -0.899 | ||
| 9 | R058609 | 0.813 | -0.266 | 0.081 | ||||
| 10 | R058610 | 0.889 | -1.122 | 0.237 | ||||
| Block R9 | ||||||||
| 1 | R060501 | 0.446 | -0.688 | 0.119 | ||||
| 2 | R060502 | 1.602 | -1.396 | 0.259 | ||||
| 3 | R060503 | 0.790 | -0.084 | 0.490 | -0.490 | |||
| 4 | R060504 | 0.847 | -0.517 | 0.150 | ||||
| 5 | R060505 | 0.615 | -0.072 | 1.008 | -0.903 | -0.105 | ||
| 6 | R060507 | 0.761 | 0.326 | 1.294 | -1.294 | |||
| 7 | R060508 | 0.675 | 1.100 | 0.656 | -0.656 | |||
| 8 | R060509 | 0.683 | -0.004 | 0.138 | -0.138 | |||
| 9 | R060510 | 0.691 | -1.017 | 0.389 | ||||
| 10 | R060511 | 0.577 | -1.487 | 0.153 | ||||
| Block R10 | ||||||||
| 1 | R060601 | 0.652 | -0.615 | 0.080 | ||||
| 2 | R060602 | 0.620 | -1.345 | 0.071 | ||||
| 3 | R060607 | 0.825 | -0.585 | 1.296 | -1.296 | |||
| 4 | R060604 | 0.567 | -1.270 | 0.225 | ||||
| 5 | R060605 | 0.795 | -0.221 | 1.390 | -1.390 | |||
| 6 | R060606 | 0.461 | 1.560 | 1.840 | -1.429 | -0.411 | ||
| 7 | R060610 | 0.859 | -0.218 | 0.289 | ||||
| 8 | R060608 | 0.713 | 0.038 | 0.381 | -0.381 | |||
| 9 | R060609 | 1.218 | -1.002 | 0.117 | ||||
| 10 | R060603 | 0.785 | 0.101 | 0.572 | -0.572 | |||
| Block R15 | ||||||||
| 1 | R0913M1 | 0.964 | -0.312 | |||||
| 2 | R0913M2 | 0.248 | 3.540 | |||||
| 3 | R0913M3 | 0.599 | 0.018 | |||||
| 4 | R091304 | 0.932 | -0.664 | 0.135 | ||||
| 5 | R091305 | 0.792 | -0.637 | |||||
| 6 | R091306 | 0.470 | 0.481 | 0.733 | -0.733 | |||
| 7 | R091307 | 0.272 | 1.962 | 0.266 | ||||
| 8 | R091308 | 1.051 | 0.063 | 0.237 | ||||
| 9 | R091309 | 0.578 | 0.964 | 0.756 | -0.756 | |||
| 10 | R091310 | 0.575 | 0.875 | 0.533 | -0.071 | -0.462 | ||
| Block R18 | ||||||||
| 1 | R085401 | 0.686 | 2.313 | 0.378 | ||||
| 2 | R0854M2 | 0.541 | -0.380 | |||||
| 3 | R085403 | 0.620 | -1.067 | 0.114 | ||||
| 4 | R085404 | 1.171 | -1.246 | 0.277 | ||||
| 5 | R085405 | 1.000 | -1.209 | |||||
| 7 | R085407 | 0.788 | 0.045 | 1.111 | -0.364 | -0.747 | ||
| 8 | R0854M8 | 1.070 | -1.141 | |||||
| 9 | R085409 | 0.595 | -0.817 | 0.346 | -0.346 | |||
| 10 | R085410 | 0.957 | -0.150 | |||||
| 11 | R085411 | 0.775 | -0.449 | 0.568 | -0.568 | |||
Last updated 24 July 2024 (SK)