Table of Contents | Search Technical Documentation | References
NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Assessment IRT Parameters → Mathematics Assessment IRT Parameters → IRT Parameters for Items in the Algebra Subscale, Grade 4 Mathematics Combined National and State Assessment, by Block and Item: 2022
NAEP Technical DocumentationIRT Parameters for Items in the Algebra 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 | ||||||||
| 2 | M246701 | 1.059 | -2.010 | 0.174 | ||||
| 6 | M246001 | 0.679 | -0.458 | 0.739 | -0.739 | |||
| Block M2 | ||||||||
| 3 | M244401 | 0.957 | -2.009 | |||||
| 16 | M394601 | 0.520 | 2.135 | -1.802 | 1.802 | |||
| 18 | M392501 | 2.348 | 1.880 | 0.216 | ||||
| Block M3 | ||||||||
| 6 | M3725MS | 0.358 | 1.156 | 1.263 | -1.263 | |||
| 14 | M3743MS | 0.572 | 1.710 | |||||
| 15 | M3715CL | 0.425 | 2.164 | 1.421 | -2.950 | 1.528 | ||
| Block M4 | ||||||||
| 7 | M342101 | 0.539 | 0.530 | 0.073 | -0.073 | |||
| 14 | M345201 | 1.557 | 0.912 | 0.135 | ||||
| 16 | M344801 | 1.430 | 0.281 | 0.163 | ||||
| Block M5 | ||||||||
| 4 | M227601 | 0.975 | -0.359 | 0.189 | ||||
| 12 | M226801 | 1.132 | 0.766 | |||||
| 18 | M342501 | 1.039 | 0.023 | 0.158 | ||||
| Block M6 | ||||||||
| 1 | M219701 | 1.154 | -1.384 | 0.161 | ||||
| 4 | M220001 | 0.449 | -1.355 | -1.556 | 1.556 | |||
| 19 | M219301 | 0.524 | 0.304 | 0.127 | ||||
| Block M7 | ||||||||
| 5 | M156601 | 0.700 | 0.615 | 0.117 | ||||
| 9 | M156201 | 0.264 | 1.059 | 0.134 | ||||
| 14 | M2311CL | 0.795 | 0.613 | -0.344 | 0.471 | -0.126 | ||
| Block M8 | ||||||||
| 5 | M3783CL | 0.832 | -0.605 | 0.509 | -0.509 | |||
| 13 | M3757MS | 0.436 | 1.019 | 0.341 | -0.341 | |||
| Block M9 | ||||||||
| 2 | M244501 | 1.270 | -0.975 | 0.121 | ||||
| 5 | M367901 | 1.085 | -1.013 | 0.076 | ||||
| 13 | M242901 | 1.199 | 0.841 | 0.456 | ||||
| 15 | M378801 | 0.608 | 2.571 | -1.099 | 1.099 | |||
| Block M10 | ||||||||
| 5 | M229201 | 0.935 | -0.424 | 0.168 | ||||
| 13 | M240601 | 0.859 | -0.456 | |||||
| Block M11 | ||||||||
| 6 | M242101 | 0.669 | -1.013 | -1.547 | 1.547 | |||
| 14 | M3973MS | 0.701 | 1.155 | 0.058 | -0.058 | |||
| Block M12 | ||||||||
| 2 | M244301 | 1.052 | -0.851 | 0.178 | ||||
| 7 | M3944MS | 0.565 | -0.378 | 1.295 | -1.295 | |||
| 17 | M391301 | 1.109 | 1.962 | |||||
| Block M13 | ||||||||
| 3 | M247101 | 0.898 | -1.235 | |||||
| 7 | M399601 | 1.371 | -0.426 | 0.156 | ||||
| 12 | M398601 | 0.965 | 1.216 | |||||
| 17 | M400801 | 2.701 | 2.333 | 0.165 | ||||
| Block M14 | ||||||||
| 6 | M3984MS | 0.591 | -0.278 | 0.154 | -0.154 | |||
| 11 | M228801 | 1.142 | 0.899 | 0.356 | ||||
| 14 | M3713MS | 0.493 | 0.846 | -1.039 | 1.039 | |||
Last updated 24 July 2024 (SK)