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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 Geometry Subscale, Grade 4 Mathematics Combined National and State Assessment, by Block and Item: 2019
NAEP Technical DocumentationIRT Parameters for Items in the Geometry Subscale, Grade 4 Mathematics Combined National and State Assessment, by Block and Item: 2019
| 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), 2019 Mathematics Assessment. | ||||||||
| Block M1 | ||||||||
| 7 | M244701 | 0.76 | -0.76 | 0.30 | ||||
| 14 | M395401 | 0.95 | 0.89 | 0.26 | ||||
| Block M2 | ||||||||
| 4 | M246301 | 0.41 | -2.37 | 0.24 | ||||
| 14 | M3914CL | 0.39 | 1.68 | -0.15 | 0.35 | -0.20 | ||
| Block M3 | ||||||||
| 2 | M374001 | 0.35 | 1.46 | 0.25 | ||||
| 10 | M3684MS | 0.33 | 1.92 | -0.59 | 0.59 | |||
| Block M4 | ||||||||
| 1 | M228401 | 0.86 | -0.25 | 0.46 | ||||
| 4 | M342001 | 0.88 | 0.49 | 0.20 | ||||
| 9 | M343101 | 0.90 | 1.93 | 0.30 | ||||
| 19 | M241001 | 0.79 | 0.87 | 0.16 | ||||
| Block M5 | ||||||||
| 3 | M224301 | 0.42 | -1.50 | -0.76 | 0.76 | |||
| 13 | M338701 | 1.17 | 1.98 | 0.15 | ||||
| 17 | M219601 | 0.50 | 0.93 | 0.43 | ||||
| Block M6 | ||||||||
| 2 | M219801 | 0.81 | -0.63 | 0.26 | ||||
| 5 | M220101 | 0.99 | 1.02 | 0.18 | ||||
| 15 | M341701 | 0.08 | 7.33 | 0.17 | ||||
| 18 | M230901 | 0.77 | 0.21 | 0.23 | ||||
| Block M7 | ||||||||
| 4 | M156101 | 0.50 | 0.91 | -0.03 | 0.03 | |||
| 12 | D1575MS | 0.64 | -0.14 | 0.66 | -0.66 | |||
| 16 | M339401 | 0.75 | 0.68 | 0.19 | -0.19 | |||
| Block M8 | ||||||||
| 4 | M377701 | 0.50 | -1.37 | |||||
| 7 | M375501 | 0.32 | 1.20 | 0.31 | ||||
| Block M9 | ||||||||
| 3 | M246501 | 0.56 | -1.71 | 0.15 | ||||
| 9 | M3998MS | 0.70 | -0.08 | |||||
| 11 | M3781MS | 0.45 | -0.31 | |||||
| Block M10 | ||||||||
| 3 | M227201 | 0.39 | 0.46 | -0.83 | 0.83 | |||
| 6 | M227701 | 1.19 | -0.04 | 0.12 | ||||
| 17 | M219201 | 1.03 | -0.70 | 0.18 | ||||
| Block M11 | ||||||||
| 2 | M245701 | 0.63 | -1.72 | 0.21 | ||||
| 16 | M3962CL | 0.27 | 2.83 | -0.32 | 1.38 | -1.18 | 0.11 | |
| Block M12 | ||||||||
| 3 | M245001 | 0.84 | -1.72 | -0.75 | 0.75 | |||
| 15 | M371001 | 0.89 | 1.10 | 0.10 | ||||
| Block M13 | ||||||||
| 4 | M398501 | 0.46 | -0.51 | 0.24 | ||||
| 8 | M392701 | 1.08 | -0.22 | 0.16 | ||||
| Block M14 | ||||||||
| 7 | M391701 | 0.58 | -0.39 | |||||
| 13 | M376701 | 1.09 | 1.21 | 0.08 | ||||
| 16 | M4195MS | 0.72 | 1.32 | |||||
Last updated 05 December 2023 (SK)
