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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 4 Reading Combined National and State Assessment, by Block and Item: 2022
NAEP Technical DocumentationIRT Parameters for Items in the Informational 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 R4 | ||||||||
| 1 | R070201 | 0.585 | 0.443 | 0.208 | ||||
| 2 | R070202 | 1.451 | 0.703 | 0.182 | ||||
| 3 | R070203 | 0.956 | -0.518 | 0.202 | ||||
| 4 | R070204 | 0.754 | 1.393 | 1.162 | -1.162 | |||
| 5 | R070205 | 1.493 | -0.718 | 0.222 | ||||
| 6 | R070206 | 1.044 | 0.854 | 1.272 | -0.878 | -0.394 | ||
| 7 | R070207 | 1.950 | -0.022 | 0.289 | ||||
| 8 | R070208 | 1.455 | 0.348 | 0.259 | ||||
| 9 | R070209 | 1.655 | 0.286 | 0.184 | ||||
| 10 | R070210 | 0.596 | 0.835 | 0.037 | -0.037 | |||
| Block R7 | ||||||||
| 1 | R058801 | 1.548 | 0.260 | 0.519 | ||||
| 2 | R058802 | 1.547 | -0.075 | 0.227 | ||||
| 3 | R058803 | 3.205 | 0.349 | 0.254 | ||||
| 4 | R058804 | 1.800 | 0.346 | 0.247 | ||||
| 5 | R058805 | 0.727 | -0.416 | |||||
| 6 | R058806 | 1.384 | 1.184 | 0.303 | ||||
| 7 | R058807 | 0.581 | 0.574 | 0.681 | 0.596 | -1.276 | ||
| 8 | R058808 | 1.376 | 0.617 | 0.295 | ||||
| 9 | R058809 | 1.437 | 0.702 | 0.305 | ||||
| 10 | R058810 | 0.707 | 0.737 | 0.634 | -0.634 | |||
| Block R9 | ||||||||
| 1 | R088301 | 1.086 | 0.259 | 0.207 | ||||
| 2 | R088302 | 0.776 | 0.468 | 0.815 | -0.815 | |||
| 3 | R088303 | 1.101 | 0.255 | 0.278 | ||||
| 4 | R088304 | 1.018 | 0.053 | 0.262 | ||||
| 5 | R088306 | 1.032 | 0.538 | 0.269 | ||||
| 6 | R088307 | 1.331 | 0.774 | 0.251 | ||||
| 7 | R088308 | 0.836 | 0.446 | |||||
| 8 | R088309 | 0.518 | 0.715 | 0.989 | -0.054 | -0.935 | ||
| 9 | R088310 | 0.790 | 0.662 | 1.027 | -1.027 | |||
| Block R10 | ||||||||
| 1 | R082301 | 1.060 | 0.799 | 0.233 | ||||
| 2 | R082302 | 1.153 | -0.910 | 0.307 | ||||
| 3 | R082303 | 1.597 | 0.578 | 0.215 | ||||
| 4 | R082304 | 0.778 | 0.354 | 0.315 | ||||
| 5 | R082305 | 0.792 | 0.309 | 0.683 | -0.683 | |||
| 6 | R082307 | 0.364 | 0.942 | 1.103 | -1.065 | -0.038 | ||
| 7 | R082308 | 1.328 | 0.365 | 0.218 | ||||
| 8 | R082309 | 0.680 | 0.637 | 1.412 | -1.412 | |||
| 9 | R082310 | 1.094 | 0.654 | 0.287 | ||||
| 10 | R082311 | 0.729 | 0.186 | |||||
| Block R14 | ||||||||
| 1 | R0879M2 | 1.062 | 1.042 | |||||
| 2 | R087903 | 1.060 | 0.482 | 0.223 | ||||
| 3 | R087904 | 0.431 | 0.596 | -1.759 | 1.759 | |||
| 4 | R087906 | 0.481 | 0.461 | 0.646 | -0.646 | |||
| 5 | R087907 | 1.893 | 0.861 | 0.326 | ||||
| 6 | R0879M8 | 0.814 | -0.150 | |||||
| 7 | R087909 | 0.904 | -0.025 | |||||
| 8 | R087912 | 1.291 | 0.679 | 0.369 | ||||
| 9 | R087913 | 0.521 | 0.673 | 0.161 | -0.161 | |||
Last updated 24 July 2024 (SK)