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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 Algebra Subscale, Grade 4 Mathematics Combined National and State Assessment, by Block and Item: 2019
NAEP Technical DocumentationIRT Parameters for Items in the Algebra 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 | ||||||||
| 2 | M246701 | 1.01 | -2.16 | 0.15 | ||||
| 6 | M246001 | 0.60 | -0.61 | 0.78 | -0.78 | |||
| Block M2 | ||||||||
| 3 | M244401 | 1.01 | -2.01 | |||||
| 16 | M394601 | 0.51 | 2.19 | -1.72 | 1.72 | |||
| 18 | M392501 | 2.40 | 1.93 | 0.21 | ||||
| Block M3 | ||||||||
| 6 | M3725MS | 0.35 | 1.23 | 1.41 | -1.41 | |||
| 14 | M3743MS | 0.49 | 1.83 | |||||
| 15 | M3715CL | 0.39 | 2.46 | 1.58 | -3.31 | 1.73 | ||
| Block M4 | ||||||||
| 7 | M342101 | 0.53 | 0.51 | 0.03 | -0.03 | |||
| 14 | M345201 | 1.34 | 1.00 | 0.13 | ||||
| 16 | M344801 | 1.34 | 0.19 | 0.17 | ||||
| Block M5 | ||||||||
| 4 | M227601 | 0.87 | -0.48 | 0.17 | ||||
| 12 | M226801 | 1.05 | 0.78 | |||||
| 18 | M342501 | 0.93 | -0.09 | 0.15 | ||||
| Block M6 | ||||||||
| 1 | M219701 | 1.02 | -1.59 | 0.13 | ||||
| 4 | M220001 | 0.40 | -1.52 | -1.78 | 1.78 | |||
| 19 | M219301 | 0.53 | 0.32 | 0.15 | ||||
| Block M7 | ||||||||
| 5 | M156601 | 0.72 | 0.54 | 0.12 | ||||
| 9 | M156201 | 0.22 | 1.01 | 0.14 | ||||
| 14 | M2311CL | 0.79 | 0.52 | -0.28 | 0.45 | -0.17 | ||
| Block M8 | ||||||||
| 5 | M3783CL | 0.80 | -0.69 | 0.53 | -0.53 | |||
| 13 | M3757MS | 0.40 | 1.02 | 0.35 | -0.35 | |||
| Block M9 | ||||||||
| 2 | M244501 | 1.22 | -1.13 | 0.11 | ||||
| 5 | M367901 | 1.08 | -1.13 | 0.07 | ||||
| 13 | M242901 | 1.03 | 0.85 | 0.44 | ||||
| 15 | M378801 | 0.62 | 2.56 | -0.94 | 0.94 | |||
| Block M10 | ||||||||
| 5 | M229201 | 0.86 | -0.55 | 0.13 | ||||
| 13 | M240601 | 0.79 | -0.66 | |||||
| Block M11 | ||||||||
| 6 | M242101 | 0.64 | -1.15 | -1.64 | 1.64 | |||
| 14 | M3973MS | 0.62 | 1.22 | 0.06 | -0.06 | |||
| Block M12 | ||||||||
| 2 | M244301 | 1.02 | -1.07 | 0.18 | ||||
| 7 | M3944MS | 0.57 | -0.49 | 1.37 | -1.37 | |||
| 17 | M391301 | 1.08 | 1.99 | |||||
| Block M13 | ||||||||
| 3 | M247101 | 0.86 | -1.35 | |||||
| 7 | M399601 | 1.25 | -0.54 | 0.14 | ||||
| 12 | M398601 | 0.85 | 1.24 | |||||
| 17 | M400801 | 2.50 | 2.30 | 0.16 | ||||
| Block M14 | ||||||||
| 6 | M3984MS | 0.56 | -0.36 | 0.21 | -0.21 | |||
| 11 | M228801 | 1.08 | 0.80 | 0.33 | ||||
| 14 | M3713MS | 0.44 | 0.91 | -1.23 | 1.23 | |||
Last updated 05 December 2023 (SK)