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NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Assessment IRT Parameters → Reading Long-Term Trend Assessment IRT Parameters → IRT Parameters for Items in the Univariate Scale, Age 13 Reading Long-Term Trend National Assessment, by Block and Item: 2023
NAEP Technical DocumentationIRT Parameters for Items in the Univariate Scale, Age 13 Reading Long-Term Trend National Assessment, by Block and Item: 2023
| Item | NAEP ID | a | b | c | d | 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), 2023 Reading Long-Term Trend Assessment. | ||||||||
| Block R1 | ||||||||
| 1 | N023701 | 0.903 | -1.893 | 0.302 | ||||
| 2 | N023702 | 1.047 | -1.153 | 0.230 | ||||
| 3 | N021201 | 1.269 | -1.274 | 0.236 | ||||
| 4 | N021202 | 0.865 | 0.251 | 0.209 | ||||
| 5 | N021203 | 0.303 | -0.307 | 3.135 | 0.556 | -1.235 | -2.456 | |
| 6 | N021301 | 1.154 | -0.881 | 0.176 | ||||
| 7 | N021302 | 1.426 | 0.425 | 0.133 | ||||
| 8 | N021303 | 1.156 | 0.100 | 0.212 | ||||
| 9 | N023101 | 1.160 | -0.027 | 0.276 | ||||
| 10 | N023102 | 1.300 | 0.011 | 0.305 | ||||
| Block R2 | ||||||||
| 1 | N021401 | 0.445 | -0.326 | 0.313 | ||||
| 2 | N021402 | 0.566 | -0.566 | 0.131 | ||||
| 3 | N021403 | 1.390 | 0.056 | 0.227 | ||||
| 4 | N021501 | 1.280 | -0.972 | 0.280 | ||||
| 5 | N021502 | 1.112 | -0.524 | 0.284 | ||||
| 6 | N021503 | 1.029 | -1.333 | 0.219 | ||||
| 7 | N023801 | 1.438 | -1.234 | 0.253 | ||||
| 8 | N023802 | 0.514 | -0.561 | -0.181 | 2.307 | -2.126 | ||
| 9 | N023901 | 1.108 | 0.344 | 0.216 | ||||
| Block R3 | ||||||||
| 1 | N024001 | 1.135 | 0.191 | 0.287 | ||||
| 2 | N024002 | 1.518 | -0.504 | 0.239 | ||||
| 3 | N021801 | 0.842 | -1.083 | 0.317 | ||||
| 4 | N021802 | 0.896 | 0.319 | 0.312 | ||||
| 5 | N021803 | 0.318 | 1.435 | -1.110 | 1.110 | |||
| 6 | N022001 | 1.103 | -1.221 | 0.254 | ||||
| 7 | N022002 | 1.299 | -1.254 | 0.208 | ||||
| 8 | N022003 | 1.018 | -0.681 | 0.310 | ||||
| 9 | N022004 | 1.795 | -1.221 | 0.203 | ||||
| 10 | N023601 | 1.175 | -1.598 | 0.206 | ||||
| 11 | N023602 | 0.892 | -2.038 | 0.181 | ||||
| Block R4 | ||||||||
| 1 | N024101 | 0.575 | -0.666 | 0.204 | ||||
| 2 | N024102 | 1.522 | 1.069 | 0.142 | ||||
| 3 | N024103 | 1.076 | 0.153 | 0.260 | ||||
| 4 | N024104 | 0.955 | 0.657 | 0.417 | ||||
| 5 | N022101 | 1.573 | -1.191 | 0.327 | ||||
| 6 | N022102 | 1.472 | 0.003 | 0.182 | ||||
| 7 | N022103 | 0.562 | 0.276 | 2.954 | -0.544 | -2.410 | ||
| 8 | N024201 | 0.966 | -1.085 | 0.247 | ||||
| 9 | N024202 | 1.001 | -0.376 | 0.187 | ||||
| 10 | N024203 | 1.420 | -0.488 | 0.305 | ||||
| 11 | N024204 | 0.569 | -1.590 | 0.211 | ||||
| Block R6 | ||||||||
| 1 | N024501 | 1.068 | -0.945 | 0.306 | ||||
| 2 | N024502 | 0.864 | -0.172 | 0.216 | ||||
| 3 | N024503 | 1.155 | 0.264 | 0.258 | ||||
| 4 | N024504 | 1.713 | 1.404 | 0.262 | ||||
| 5 | N024601 | 0.925 | -0.594 | 0.252 | ||||
| 6 | N024602 | 1.256 | -1.125 | 0.285 | ||||
| 7 | N024603 | 1.169 | -1.128 | 0.259 | ||||
| 8 | N024604 | 1.429 | -1.179 | 0.252 | ||||
| 9 | N024605 | 1.092 | -0.503 | 0.309 | ||||
| 10 | N024701 | 1.129 | -0.703 | 0.222 | ||||
| 11 | N024801 | 1.087 | -1.384 | 0.226 | ||||
| 12 | N024802 | 1.319 | -0.994 | 0.258 | ||||
| 13 | N022901 | 0.682 | -2.482 | 0.216 | ||||
| Block R7 | ||||||||
| 1 | N024901 | 0.670 | -0.462 | 0.206 | ||||
| 2 | N024902 | 0.845 | -1.630 | 0.350 | ||||
| 3 | N024903 | 0.929 | -1.866 | 0.302 | ||||
| 4 | N025001 | 0.839 | -0.377 | 0.353 | ||||
| 5 | N025002 | 1.202 | -0.727 | 0.265 | ||||
| 6 | N025003 | 1.024 | -0.348 | 0.283 | ||||
| 7 | N025101 | 0.736 | 0.607 | 0.273 | ||||
| 8 | N022301 | 1.638 | -0.996 | 0.222 | ||||
| 9 | N025201 | 1.072 | -0.533 | 0.268 | ||||
| 10 | N025202 | 0.869 | -0.458 | 0.285 | ||||
| 11 | N025301 | 0.762 | 0.292 | 0.272 | ||||
| Block R8 | ||||||||
| 1 | N031001 | 0.965 | 0.103 | 0.286 | ||||
| 2 | N031002 | 1.391 | -0.551 | 0.308 | ||||
| 3 | N033801 | 0.400 | -1.780 | 0.232 | ||||
| 4 | N033803 | 0.784 | -2.130 | 0.200 | ||||
| 5 | N034201 | 0.741 | -1.316 | 0.239 | ||||
| 6 | N034202 | 1.299 | 0.554 | 0.270 | ||||
| 7 | N034203 | 0.477 | 0.236 | 1.148 | 0.612 | -1.338 | -0.422 | |
| 8 | N030001 | 1.265 | -0.504 | 0.164 | ||||
| 9 | N030002 | 1.081 | -0.408 | 0.278 | ||||
| Block R9 | ||||||||
| 1 | N028701 | 1.137 | -1.384 | 0.266 | ||||
| 2 | N028702 | 1.029 | -1.307 | 0.168 | ||||
| 3 | N028703 | 1.065 | -0.956 | 0.299 | ||||
| 4 | N028704 | 1.765 | -1.699 | 0.258 | ||||
| 5 | N028801 | 0.740 | -1.430 | 0.226 | ||||
| 6 | N028802 | 1.060 | -0.683 | 0.311 | ||||
| 7 | N029001 | 0.932 | -0.005 | 0.194 | ||||
| 8 | N029002 | 0.646 | 0.247 | 1.941 | -0.440 | -1.501 | ||
| 9 | N028901 | 0.810 | -0.942 | 0.227 | ||||
| 10 | N028902 | 0.726 | -0.047 | 0.224 | ||||
| Block R10 | ||||||||
| 1 | N027701 | 1.111 | -1.581 | 0.217 | ||||
| 2 | N027702 | 1.174 | -0.368 | 0.273 | ||||
| 3 | N027801 | 0.650 | -1.555 | 0.263 | ||||
| 4 | N027802 | 2.031 | -0.927 | 0.284 | ||||
| 5 | N027803 | 1.045 | -0.500 | 0.180 | ||||
| 6 | N027804 | 0.665 | -0.216 | 0.156 | ||||
| 7 | N027805 | 1.970 | -0.621 | 0.288 | ||||
| 8 | N027901 | 0.773 | 0.717 | 0.512 | ||||
| 9 | N027902 | 1.271 | -0.706 | 0.272 | ||||
| 10 | N027903 | 1.037 | -0.246 | 0.292 | ||||
| 11 | N027904 | 0.820 | -0.368 | 0.192 | ||||
Last updated 24 July 2024 (SK)