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NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Assessment IRT Parameters → Mathematics Assessment IRT Parameters → IRT Parameters for Items in the Data Analysis, Statistics, and Probability Subscale, Grade 4 Mathematics Combined National and State Assessment, by Block and Item: 2022
NAEP Technical DocumentationIRT Parameters for Items in the Data Analysis, Statistics, and Probability Subscale, Grade 4 Mathematics 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 Mathematics Assessment. | ||||||||
| Block M1 | ||||||||
| 12 | M147801 | 1.535 | 0.841 | 0.143 | ||||
| 15 | M3758CL | 0.436 | 1.266 | 0.750 | -1.573 | 0.823 | ||
| Block M2 | ||||||||
| 6 | M374901 | 0.718 | -1.485 | |||||
| 10 | M4004MS | 1.036 | 0.765 | |||||
| Block M3 | ||||||||
| 9 | M3730MS | 0.355 | 1.228 | -1.253 | 1.253 | |||
| 12 | M369501 | 1.281 | 2.104 | 0.122 | ||||
| Block M4 | ||||||||
| 6 | M340301 | 0.963 | 0.769 | 0.238 | ||||
| 18 | M230501 | 1.723 | 0.930 | 0.383 | ||||
| Block M5 | ||||||||
| 6 | M231001 | 0.645 | 0.532 | 0.288 | ||||
| 10 | M225001 | 0.726 | 0.579 | 0.556 | -0.556 | |||
| 15 | M147601 | 0.578 | 1.994 | 0.188 | ||||
| Block M6 | ||||||||
| 7 | M220301 | 1.193 | -0.047 | 0.051 | ||||
| 10 | M220601 | 0.346 | 4.181 | 0.194 | ||||
| 17 | M147301 | 0.489 | 0.132 | 0.360 | ||||
| Block M7 | ||||||||
| 13 | M162301 | 0.677 | 0.801 | 0.097 | ||||
| 18 | M218701 | 1.230 | -0.585 | 0.191 | ||||
| Block M8 | ||||||||
| 6 | M378001 | 0.527 | 2.037 | 0.112 | ||||
| Block M9 | ||||||||
| 7 | M3708MS | 0.579 | -0.125 | -0.079 | 0.079 | |||
| 17 | M377201 | 1.191 | 3.157 | |||||
| Block M10 | ||||||||
| 8 | D2188MS | 0.842 | -0.721 | |||||
| 14 | M240301 | 0.893 | -1.489 | 0.116 | ||||
| 18 | M344901 | 1.042 | 0.860 | 0.318 | ||||
| Block M11 | ||||||||
| 4 | M3737MS | 0.814 | -2.358 | |||||
| 9 | M244801 | 2.437 | -0.639 | 0.123 | ||||
| Block M12 | ||||||||
| 5 | D2252MS | 0.520 | -0.930 | -4.469 | 4.469 | |||
| 9 | M392301 | 1.161 | -0.319 | |||||
| Block M13 | ||||||||
| 2 | M246801 | 1.004 | -1.519 | 0.222 | ||||
| 14 | M3766MS | 0.306 | 1.866 | -4.213 | 4.213 | |||
| Block M14 | ||||||||
| 9 | M243501 | 1.427 | -0.429 | 0.089 | ||||
Last updated 24 July 2024 (SK)