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NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Assessment IRT Parameters → Reading Assessment IRT Parameters → IRT Parameters for Items in the Literary Subscale, Grade 4 Reading Combined National and State Assessment, by Block and Item: 2019
NAEP Technical DocumentationIRT Parameters for Items in the Literary Subscale, Grade 4 Reading 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 Reading Assessment. | ||||||||
| Block R1 | ||||||||
| 1 | R068901 | 1.11 | -0.17 | 0.22 | ||||
| 2 | R068902 | 1.08 | 1.37 | 0.28 | ||||
| 3 | R068903 | 0.85 | -0.38 | 0.16 | ||||
| 4 | R068904 | 0.64 | -0.14 | |||||
| 5 | R068905 | 1.34 | -0.61 | 0.37 | ||||
| 6 | R068906 | 1.13 | -1.28 | 0.14 | ||||
| 7 | R068907 | 0.59 | 0.77 | 1.64 | 0.63 | -2.27 | ||
| 8 | R068908 | 1.34 | -0.78 | 0.09 | ||||
| 9 | R068909 | 0.64 | -0.77 | 0.17 | ||||
| 10 | R068910 | 0.46 | -0.28 | 0.29 | -0.29 | |||
| 11 | R068911 | 0.61 | -1.21 | 0.16 | ||||
| Block R2 | ||||||||
| 1 | R057801 | 1.11 | -0.71 | 0.19 | ||||
| 2 | R057802 | 1.04 | -0.26 | 0.18 | ||||
| 4 | R057804 | 1.08 | -0.07 | 0.28 | ||||
| 5 | R057805 | 0.57 | 0.01 | 0.27 | ||||
| 6 | R057806 | 0.65 | 0.42 | 1.71 | 0.07 | -1.78 | ||
| 7 | R057807 | 0.83 | -0.68 | |||||
| 8 | R057808 | 0.77 | 0.77 | 0.18 | ||||
| 9 | R057809 | 0.71 | 0.81 | 1.27 | -1.27 | |||
| Block R3 | ||||||||
| 1 | R079301 | 2.18 | 0.41 | 0.37 | ||||
| 2 | R079302 | 2.13 | -0.08 | 0.28 | ||||
| 3 | R079303 | 1.98 | -0.41 | 0.27 | ||||
| 4 | R079304 | 1.01 | -0.22 | 0.16 | ||||
| 5 | R079305 | 1.64 | 1.00 | 0.14 | ||||
| 6 | R079306 | 0.83 | 0.40 | 0.46 | -0.46 | |||
| 7 | R079307 | 0.58 | 0.74 | 0.62 | 0.82 | -1.44 | ||
| 8 | R079309 | 0.58 | 0.91 | -0.17 | 0.17 | |||
| 9 | R079310 | 2.40 | 0.19 | 0.21 | ||||
| 10 | R079312 | 1.37 | 0.50 | 0.28 | ||||
| Block R5 | ||||||||
| 1 | R084501 | 1.13 | 0.37 | 0.23 | ||||
| 2 | R084502 | 0.91 | 1.41 | 1.65 | -1.65 | |||
| 3 | R084503 | 1.03 | -0.48 | 0.26 | ||||
| 4 | R0845MS | 0.69 | -0.84 | 1.16 | -0.33 | -0.84 | ||
| 5 | R084505 | 1.20 | 1.10 | 0.11 | ||||
| 6 | R084506 | 0.64 | -0.06 | 0.19 | ||||
| 7 | R084507 | 0.87 | -0.22 | |||||
| 8 | R084508 | 0.64 | 1.05 | 0.79 | 0.37 | -1.17 | ||
| 9 | R084510 | 0.96 | 0.07 | 0.30 | ||||
| Block R6 | ||||||||
| 1 | R058601 | 1.03 | 0.22 | 0.12 | ||||
| 2 | R058602 | 0.60 | 0.77 | 0.62 | -0.62 | |||
| 3 | R058603 | 1.39 | 0.33 | 0.41 | ||||
| 4 | R058604 | 1.45 | 0.34 | 0.25 | ||||
| 5 | R058605 | 1.23 | 0.73 | 0.18 | ||||
| 6 | R058606 | 0.75 | 1.23 | 0.55 | -0.55 | |||
| 7 | R058607 | 1.42 | 0.39 | 0.31 | ||||
| 8 | R058608 | 0.74 | 1.50 | 1.39 | -0.43 | -0.96 | ||
| 9 | R058609 | 1.11 | 0.81 | 0.15 | ||||
| 10 | R058610 | 1.12 | 0.20 | 0.30 | ||||
| Block R15 | ||||||||
| 1 | R086501 | 0.62 | 1.01 | 0.57 | -0.57 | |||
| 2 | R086502 | 0.82 | -0.49 | 0.18 | ||||
| 3 | R0865M4 | 0.98 | 0.97 | |||||
| 4 | R086505 | 1.08 | 0.05 | 0.34 | ||||
| 5 | R086506 | 0.98 | -0.40 | 0.15 | ||||
| 6 | R086507 | 2.02 | -0.10 | 0.18 | ||||
| 7 | R086508 | 1.64 | -0.11 | 0.23 | ||||
| 8 | R086509 | 1.84 | -0.39 | 0.29 | ||||
| 9 | R086511 | 0.69 | 0.60 | 1.12 | -1.12 | |||
| 10 | R086512 | 1.33 | 0.38 | 0.23 | ||||
| 11 | R086514 | 0.62 | 1.32 | 0.55 | 0.90 | -1.44 | ||
Last updated 05 December 2023 (SK)