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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 Measurement Subscale, Grade 4 Mathematics Combined National and State Assessment, by Block and Item: 2019
NAEP Technical DocumentationIRT Parameters for Items in the Measurement Subscale, Grade 4 Mathematics Combined National and State Assessment, by Block and Item: 2019
| 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), 2019 Mathematics Assessment. | ||||||||
| Block M1 | ||||||||
| 4 | M373401 | 0.48 | -1.65 | 0.14 | ||||
| 9 | M398901 | 0.64 | 0.31 | 0.32 | ||||
| 11 | M392901 | 0.70 | 0.22 | 0.17 | ||||
| 16 | M4013MS | 0.41 | 0.51 | -2.66 | 2.66 | |||
| Block M2 | ||||||||
| 1 | M243201 | 0.91 | -2.39 | 0.17 | ||||
| 8 | M395001 | 0.33 | -0.86 | 0.09 | ||||
| 12 | M241701 | 1.29 | -0.08 | 0.10 | ||||
| 15 | M245901 | 0.64 | -0.17 | 0.11 | ||||
| 17 | M369401 | 0.73 | 1.46 | 0.46 | -0.46 | |||
| Block M3 | ||||||||
| 1 | M3692MS | 0.84 | -2.09 | |||||
| 4 | M230001 | 0.58 | 0.05 | 0.11 | ||||
| 7 | M3711CL | 0.51 | 0.19 | 0.62 | -2.19 | 1.58 | ||
| Block M4 | ||||||||
| 2 | M344501 | 0.60 | -1.54 | 0.15 | ||||
| 11 | M343801 | 1.28 | 0.78 | 0.20 | ||||
| 17 | M338501 | 0.75 | -0.44 | 0.13 | ||||
| Block M5 | ||||||||
| 1 | M226901 | 1.38 | 1.00 | 0.38 | ||||
| 9 | M219401 | 0.78 | -1.43 | 0.14 | ||||
| Block M6 | ||||||||
| 3 | M219901 | 0.48 | 0.72 | 0.14 | ||||
| 14 | M221101 | 1.04 | 0.42 | 0.15 | -0.15 | |||
| Block M7 | ||||||||
| 2 | M156301 | 0.67 | -1.58 | 0.16 | ||||
| 7 | M158301 | 1.09 | 1.28 | 0.22 | ||||
| Block M8 | ||||||||
| 1 | M3764MS | 0.66 | -1.30 | |||||
| 9 | M3756MS | 0.56 | 1.33 | -1.36 | 1.36 | |||
| 11 | M378401 | 0.33 | 4.76 | |||||
| Block M9 | ||||||||
| 14 | M398201 | 0.78 | 1.26 | |||||
| 16 | M400601 | 0.77 | 1.34 | 0.15 | ||||
| Block M10 | ||||||||
| 4 | M339101 | 0.54 | 0.76 | 0.13 | ||||
| 10 | M339201 | 0.85 | 0.18 | 0.13 | ||||
| 15 | M218601 | 0.81 | -1.11 | 0.12 | ||||
| 19 | M219001 | 0.58 | -1.13 | 0.11 | ||||
| Block M11 | ||||||||
| 8 | M390801 | 0.80 | -0.03 | 0.35 | ||||
| 11 | M245101 | 1.35 | -0.81 | 0.12 | ||||
| 13 | M3721MS | 0.70 | 0.04 | |||||
| 15 | M402001 | 0.94 | 1.21 | 0.45 | -0.45 | |||
| Block M12 | ||||||||
| 10 | M393501 | 0.60 | -1.00 | 0.12 | ||||
| 12 | M375001 | 0.91 | -0.53 | 0.07 | ||||
| 14 | M370001 | 0.57 | 1.89 | -1.08 | 1.08 | |||
| Block M13 | ||||||||
| 6 | M377801 | 0.88 | -0.83 | 0.12 | ||||
| 10 | M3926MS | 0.55 | 0.28 | -0.62 | 0.62 | |||
| 15 | M400001 | 0.36 | 1.52 | 0.13 | ||||
| Block M14 | ||||||||
| 2 | M246201 | 0.96 | -1.30 | 0.22 | ||||
| 4 | M246901 | 0.79 | -0.95 | 0.21 | ||||
Last updated 05 December 2023 (SK)