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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 Informational Subscale, Grade 8 Reading Combined National and State Assessment, by Block and Item: 2019
NAEP Technical DocumentationIRT Parameters for Items in the Informational Subscale, Grade 8 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 R3 | ||||||||
| 1 | R060101 | 0.60 | -0.61 | 0.25 | ||||
| 2 | R060102 | 0.98 | -0.48 | 0.29 | ||||
| 3 | R060103 | 0.76 | -0.69 | |||||
| 4 | R060104 | 0.86 | -0.75 | 0.22 | ||||
| 5 | R060105 | 0.97 | -0.44 | |||||
| 6 | R060106 | 0.84 | -0.08 | 0.16 | ||||
| 7 | R060107 | 1.20 | 0.50 | 0.25 | ||||
| 8 | R060108 | 0.61 | 0.21 | 0.41 | 0.30 | -0.71 | ||
| 9 | R060109 | 0.73 | 0.54 | 0.09 | ||||
| 10 | R060110 | 0.65 | 0.07 | 0.18 | ||||
| Block R4 | ||||||||
| 1 | R080001 | 1.45 | -0.09 | 0.42 | ||||
| 2 | R080002 | 1.11 | 0.66 | 0.22 | ||||
| 3 | R080003 | 0.73 | -0.20 | 0.21 | ||||
| 4 | R080004 | 1.45 | 0.06 | 0.24 | ||||
| 5 | R080005 | 0.81 | 0.45 | 0.30 | -0.04 | -0.26 | ||
| 6 | R080006 | 1.29 | 0.12 | 0.16 | ||||
| 7 | R080007 | 0.69 | 0.79 | |||||
| 8 | R080008 | 0.67 | 2.18 | 0.34 | ||||
| 9 | R080009 | 0.62 | 0.71 | 0.69 | -0.69 | |||
| 10 | R080010 | 0.76 | 0.47 | 0.76 | -0.76 | |||
| Block R7 | ||||||||
| 1 | R058801 | 1.41 | -0.64 | 0.49 | ||||
| 2 | R058802 | 1.55 | -1.37 | 0.27 | ||||
| 3 | R058803 | 2.20 | -0.79 | 0.29 | ||||
| 4 | R058804 | 1.00 | -0.87 | 0.20 | ||||
| 5 | R058805 | 0.71 | -2.11 | |||||
| 6 | R058806 | 0.56 | -0.16 | 0.23 | ||||
| 7 | R058807 | 0.49 | -0.97 | 0.94 | 0.56 | -1.50 | ||
| 8 | R058808 | 0.94 | -0.89 | 0.29 | ||||
| 9 | R058809 | 0.80 | -0.49 | 0.20 | ||||
| 10 | R058810 | 0.53 | -0.80 | 0.83 | -0.83 | |||
| Block R8 | ||||||||
| 1 | R079701 | 1.15 | -1.01 | 0.09 | ||||
| 2 | R079702 | 1.13 | -1.11 | 0.37 | ||||
| 3 | R079703 | 0.68 | -0.27 | |||||
| 4 | R079704 | 0.65 | -1.66 | 0.12 | ||||
| 5 | R079705 | 1.38 | -0.94 | 0.30 | ||||
| 6 | R079706 | 0.69 | -0.60 | -0.60 | 0.60 | |||
| 7 | R079707 | 0.68 | -0.50 | 0.64 | 0.15 | -0.79 | ||
| 8 | R079708 | 1.03 | -0.59 | 0.35 | ||||
| 9 | R079709 | 0.76 | 0.41 | 1.05 | -1.05 | |||
| 10 | R079710 | 1.12 | -0.96 | 0.15 | ||||
| Block R11 | ||||||||
| 1 | R091701 | 0.83 | 0.46 | 0.25 | ||||
| 2 | R091702 | 0.90 | -0.28 | 0.28 | ||||
| 3 | R091703 | 0.50 | -0.62 | -0.31 | 0.31 | |||
| 4 | R091704 | 0.77 | -1.44 | |||||
| 5 | R091705 | 0.90 | -0.18 | 0.29 | ||||
| 6 | R091706 | 0.57 | 0.53 | 0.44 | -0.44 | |||
| 7 | R091707 | 0.81 | 1.00 | 0.67 | -0.36 | -0.32 | ||
| 8 | R091708 | 1.05 | -0.11 | 0.18 | ||||
| 9 | R091709 | 1.19 | 0.71 | 0.22 | ||||
| 10 | R091710 | 0.96 | 0.12 | 0.31 | ||||
| Block R12 | ||||||||
| 1 | R061001 | 1.06 | -1.26 | 0.13 | ||||
| 2 | R061002 | 0.85 | -0.60 | 0.28 | ||||
| 3 | R061003 | 0.78 | -0.05 | 0.57 | -0.57 | |||
| 4 | R061004 | 0.83 | -1.12 | |||||
| 5 | R061005 | 0.44 | -0.48 | 0.20 | ||||
| 6 | R061006 | 0.81 | -0.21 | |||||
| 7 | R061007 | 0.50 | 0.63 | 1.37 | -1.75 | 0.38 | ||
| 8 | R061008 | 0.83 | -0.29 | 0.20 | ||||
| 9 | R061009 | 0.95 | -1.10 | 0.15 | ||||
| 10 | R061010 | 0.56 | 0.51 | 1.47 | -1.47 | |||
| Block R14 | ||||||||
| 1 | R092301 | 0.99 | -1.06 | 0.38 | ||||
| 2 | R092302 | 0.60 | -1.51 | |||||
| 3 | R092303 | 0.46 | 1.28 | 0.34 | ||||
| 4 | R092304 | 0.72 | 0.45 | |||||
| 5 | R092305 | 0.78 | 1.28 | 0.08 | ||||
| 6 | R092306 | 0.50 | -1.00 | 0.69 | -0.69 | |||
| 7 | R0923MS | 0.42 | 1.09 | 0.00 | 0.00 | |||
| 8 | R092308 | 0.52 | -0.69 | 0.93 | -0.93 | |||
| Block R17 | ||||||||
| 1 | R090201 | 0.38 | -0.94 | 0.10 | ||||
| 2 | R090202 | 1.29 | 0.83 | 0.30 | ||||
| 3 | R090203 | 0.88 | -1.25 | 0.27 | ||||
| 4 | R0902M4 | 0.78 | -0.34 | |||||
| 5 | R090205 | 0.50 | 0.79 | 1.26 | -1.26 | |||
| 6 | R090206 | 1.06 | -0.31 | 0.15 | ||||
| 7 | R0902M7 | 0.82 | 0.22 | 0.21 | -0.21 | |||
| 8 | R090208 | 0.41 | -0.36 | 0.64 | -0.36 | -0.29 | ||
| 9 | R090210 | 1.10 | -0.87 | 0.35 | ||||
| 10 | R090211 | 0.77 | 0.52 | 1.29 | -1.29 | |||
Last updated 05 December 2023 (SK)