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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 Geometry Subscale, Grade 4 Mathematics Combined National and State Assessment, by Block and Item: 2022
NAEP Technical DocumentationIRT Parameters for Items in the Geometry Subscale, Grade 4 Mathematics Combined National and State Assessment, by Block and Item: 2022
| 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), 2022 Mathematics Assessment. | ||||||||
| Block M1 | ||||||||
| 7 | M244701 | 0.839 | -0.468 | 0.342 | ||||
| 14 | M395401 | 0.975 | 0.998 | 0.282 | ||||
| Block M2 | ||||||||
| 4 | M246301 | 0.452 | -2.043 | 0.255 | ||||
| 14 | M3914CL | 0.392 | 1.659 | -0.201 | 0.331 | -0.130 | ||
| Block M3 | ||||||||
| 2 | M374001 | 0.341 | 1.153 | 0.225 | ||||
| 10 | M3684MS | 0.336 | 1.964 | -0.532 | 0.532 | |||
| Block M4 | ||||||||
| 1 | M228401 | 0.779 | -0.443 | 0.331 | ||||
| 4 | M342001 | 0.823 | 0.546 | 0.168 | ||||
| 9 | M343101 | 1.120 | 2.000 | 0.322 | ||||
| 19 | M241001 | 0.779 | 0.904 | 0.156 | ||||
| Block M5 | ||||||||
| 3 | M224301 | 0.452 | -1.238 | -0.618 | 0.618 | |||
| 13 | M338701 | 1.048 | 2.158 | 0.140 | ||||
| 17 | M219601 | 0.742 | 1.188 | 0.490 | ||||
| Block M6 | ||||||||
| 2 | M219801 | 0.791 | -0.685 | 0.182 | ||||
| 5 | M220101 | 1.123 | 1.107 | 0.189 | ||||
| 15 | M341701 | 0.075 | 7.576 | 0.170 | ||||
| 18 | M230901 | 0.732 | 0.277 | 0.194 | ||||
| Block M7 | ||||||||
| 4 | M156101 | 0.483 | 0.959 | 0.023 | -0.023 | |||
| 12 | D1575MS | 0.658 | -0.020 | 0.610 | -0.610 | |||
| 16 | M339401 | 0.841 | 0.761 | 0.216 | -0.216 | |||
| Block M8 | ||||||||
| 4 | M377701 | 0.501 | -1.212 | |||||
| 7 | M375501 | 0.389 | 1.064 | 0.303 | ||||
| Block M9 | ||||||||
| 3 | M246501 | 0.594 | -1.626 | 0.148 | ||||
| 9 | M3998MS | 0.737 | -0.026 | |||||
| 11 | M3781MS | 0.441 | -0.263 | |||||
| Block M10 | ||||||||
| 3 | M227201 | 0.398 | 0.498 | -0.813 | 0.813 | |||
| 6 | M227701 | 1.188 | 0.019 | 0.137 | ||||
| 17 | M219201 | 1.041 | -0.662 | 0.150 | ||||
| Block M11 | ||||||||
| 2 | M245701 | 0.625 | -1.456 | 0.306 | ||||
| 16 | M3962CL | 0.259 | 3.005 | -0.335 | 1.434 | -1.040 | -0.059 | |
| Block M12 | ||||||||
| 3 | M245001 | 0.758 | -1.666 | -1.042 | 1.042 | |||
| 15 | M371001 | 0.873 | 1.154 | 0.103 | ||||
| Block M13 | ||||||||
| 4 | M398501 | 0.586 | -0.118 | 0.332 | ||||
| 8 | M392701 | 1.180 | -0.100 | 0.190 | ||||
| Block M14 | ||||||||
| 7 | M391701 | 0.582 | -0.261 | |||||
| 13 | M376701 | 1.215 | 1.222 | 0.082 | ||||
| 16 | M4195MS | 0.735 | 1.365 | |||||
Last updated 24 July 2024 (SK)