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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 8 Reading Combined National and State Assessment, by Block and Item: 2019
NAEP Technical DocumentationIRT Parameters for Items in the Literary 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 R1 | ||||||||
| 1 | R059601 | 0.49 | 0.13 | 0.08 | ||||
| 2 | R059602 | 0.54 | -1.13 | 0.13 | ||||
| 3 | R059603 | 0.93 | -0.84 | 0.24 | ||||
| 4 | R059604 | 0.85 | -1.18 | |||||
| 5 | R059610 | 0.45 | -0.06 | 0.05 | 0.32 | -0.37 | ||
| 6 | R059606 | 0.75 | -0.52 | 0.52 | -0.52 | |||
| 7 | R059605 | 0.80 | 0.59 | 0.77 | -0.77 | |||
| 8 | R059608 | 0.71 | 0.38 | 0.22 | ||||
| 9 | R059609 | 0.79 | -1.49 | 0.21 | ||||
| 10 | R059607 | 0.68 | -0.14 | 0.89 | -0.89 | |||
| Block R2 | ||||||||
| 1 | R069801 | 0.41 | -1.11 | 2.94 | -2.94 | |||
| 2 | R069802 | 0.77 | -0.12 | 0.09 | ||||
| 3 | R069803 | 1.27 | -0.74 | 0.30 | ||||
| 4 | R069804 | 0.89 | 0.41 | 1.10 | -1.10 | |||
| 5 | R069805 | 0.64 | -0.16 | 0.28 | ||||
| 6 | R069806 | 0.61 | -0.08 | 1.75 | 0.08 | -1.83 | ||
| 7 | R069807 | 1.18 | -0.38 | 0.28 | ||||
| 8 | R069808 | 0.73 | -0.89 | 0.21 | ||||
| 9 | R069809 | 0.88 | -0.74 | 0.20 | ||||
| 10 | R069810 | 0.58 | 0.08 | 0.13 | -0.13 | |||
| Block R6 | ||||||||
| 1 | R058601 | 0.84 | -0.86 | 0.07 | ||||
| 2 | R058602 | 0.62 | -0.41 | 1.17 | -1.17 | |||
| 3 | R058603 | 1.24 | -0.82 | 0.35 | ||||
| 4 | R058604 | 1.31 | -0.81 | 0.21 | ||||
| 5 | R058605 | 0.61 | -0.80 | 0.08 | ||||
| 6 | R058606 | 0.65 | -0.07 | 0.42 | -0.42 | |||
| 7 | R058607 | 1.34 | -0.72 | 0.28 | ||||
| 8 | R058608 | 0.75 | 0.26 | 1.28 | -0.35 | -0.92 | ||
| 9 | R058609 | 0.81 | -0.36 | 0.07 | ||||
| 10 | R058610 | 0.84 | -1.32 | 0.20 | ||||
| Block R9 | ||||||||
| 1 | R060501 | 0.43 | -0.84 | 0.10 | ||||
| 2 | R060502 | 1.44 | -1.65 | 0.15 | ||||
| 3 | R060503 | 0.74 | -0.21 | 0.52 | -0.52 | |||
| 4 | R060504 | 0.93 | -0.50 | 0.19 | ||||
| 5 | R060505 | 0.59 | -0.17 | 1.00 | -0.88 | -0.12 | ||
| 6 | R060507 | 0.75 | 0.21 | 1.32 | -1.32 | |||
| 7 | R060508 | 0.68 | 0.98 | 0.68 | -0.68 | |||
| 8 | R060509 | 0.63 | -0.09 | 0.14 | -0.14 | |||
| 9 | R060510 | 0.82 | -0.75 | 0.45 | ||||
| 10 | R060511 | 0.56 | -1.48 | 0.17 | ||||
| Block R10 | ||||||||
| 1 | R060601 | 0.70 | -0.42 | 0.12 | ||||
| 2 | R060602 | 0.60 | -1.40 | 0.08 | ||||
| 3 | R060607 | 0.76 | -0.62 | 1.38 | -1.38 | |||
| 4 | R060604 | 0.59 | -1.38 | 0.19 | ||||
| 5 | R060605 | 0.76 | -0.32 | 1.47 | -1.47 | |||
| 6 | R060606 | 0.45 | 1.52 | 1.88 | -1.46 | -0.42 | ||
| 7 | R060610 | 0.93 | -0.25 | 0.29 | ||||
| 8 | R060608 | 0.63 | -0.05 | 0.29 | -0.29 | |||
| 9 | R060609 | 1.18 | -1.01 | 0.14 | ||||
| 10 | R060603 | 0.70 | 0.03 | 0.56 | -0.56 | |||
| Block R15 | ||||||||
| 1 | R0913M1 | 0.98 | -0.32 | |||||
| 2 | R0913M2 | 0.28 | 3.03 | |||||
| 3 | R0913M3 | 0.61 | -0.06 | |||||
| 4 | R091304 | 0.98 | -0.64 | 0.14 | ||||
| 5 | R091305 | 0.78 | -0.69 | |||||
| 6 | R091306 | 0.46 | 0.40 | 0.69 | -0.69 | |||
| 7 | R091307 | 0.34 | 1.45 | 0.25 | ||||
| 8 | R091308 | 1.13 | 0.05 | 0.26 | ||||
| 9 | R091309 | 0.49 | 0.97 | 0.32 | -0.32 | |||
| 10 | R091310 | 0.53 | 0.90 | 0.43 | 0.03 | -0.46 | ||
| Block R18 | ||||||||
| 1 | R085401 | 0.65 | 2.31 | 0.37 | ||||
| 2 | R0854M2 | 0.53 | -0.51 | |||||
| 3 | R085403 | 0.59 | -1.22 | 0.15 | ||||
| 4 | R085404 | 1.12 | -1.44 | 0.24 | ||||
| 5 | R085405 | 0.91 | -1.46 | |||||
| 6 | R085406 | 0.63 | -0.25 | 0.16 | ||||
| 7 | R085407 | 0.70 | -0.03 | 1.26 | -0.55 | -0.71 | ||
| 8 | R0854M8 | 1.07 | -1.26 | |||||
| 9 | R085409 | 0.51 | -0.96 | 0.45 | -0.45 | |||
| 10 | R085410 | 0.98 | -0.30 | |||||
| 11 | R085411 | 0.70 | -0.61 | 0.64 | -0.64 | |||
Last updated 05 December 2023 (SK)