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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 12 Reading National Assessment, by Block and Item: 2019
NAEP Technical DocumentationIRT Parameters for Items in the Literary Subscale, Grade 12 Reading National 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. | ||||||||
| DBA = Digitally based assessment. 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 | 0.66 | 0.08 | 0.14 | ||||
| 3 | R059603 | 0.91 | -1.04 | 0.23 | ||||
| 4 | R059604 | 1.02 | -1.18 | |||||
| 5 | R059610 | 0.48 | -0.11 | 0.07 | 0.32 | -0.39 | ||
| 6 | R059606 | 0.98 | -0.71 | 0.36 | -0.36 | |||
| 7 | R059605 | 0.91 | 0.27 | 0.60 | -0.60 | |||
| 8 | R059608 | 0.60 | -0.32 | 0.21 | ||||
| 9 | R059609 | 1.02 | -1.53 | 0.17 | ||||
| 10 | R059607 | 0.93 | -0.55 | 0.63 | -0.63 | |||
| Block R2 | ||||||||
| 1 | R069801 | 0.70 | -2.64 | |||||
| 2 | R069802 | 0.99 | -0.18 | 0.16 | ||||
| 3 | R069803 | 1.27 | -1.07 | 0.19 | ||||
| 4 | R069804 | 0.98 | 0.04 | 1.06 | -1.06 | |||
| 5 | R069805 | 0.76 | -0.39 | 0.25 | ||||
| 6 | R069806 | 0.68 | -0.40 | 1.49 | 0.00 | -1.50 | ||
| 7 | R069807 | 1.13 | -0.83 | 0.26 | ||||
| 8 | R069808 | 0.72 | -1.21 | 0.22 | ||||
| 9 | R069809 | 0.99 | -0.81 | 0.23 | ||||
| 10 | R069810 | 0.67 | -0.26 | 0.30 | -0.30 | |||
| Block R5 | ||||||||
| 1 | R061601 | 1.26 | -0.94 | 0.29 | ||||
| 2 | R061602 | 0.84 | -0.27 | 0.08 | -0.08 | |||
| 3 | R061603 | 1.50 | -1.44 | 0.22 | ||||
| 4 | R061604 | 0.90 | -0.43 | 0.96 | -0.96 | |||
| 5 | R061605 | 1.61 | 0.16 | 0.26 | ||||
| 6 | R061606 | 0.83 | 0.62 | 0.30 | -0.30 | |||
| 7 | R061607 | 0.92 | 0.17 | 0.71 | 0.33 | -1.03 | ||
| 8 | R061608 | 1.36 | 1.09 | |||||
| 9 | R061609 | 1.50 | 1.21 | 0.23 | ||||
| Block R6 | ||||||||
| 1 | R078901 | 1.08 | 0.76 | 0.19 | ||||
| 2 | R078902 | 0.86 | -0.90 | 0.18 | ||||
| 3 | R078903 | 0.57 | -0.27 | 0.28 | -0.28 | |||
| 4 | R078904 | 1.01 | 1.21 | 0.24 | ||||
| 5 | R078905 | 0.66 | 1.20 | 1.39 | -0.33 | -1.05 | ||
| 6 | R078906 | 1.61 | 0.44 | 0.16 | ||||
| 7 | R078907 | 0.86 | 0.33 | |||||
| 8 | R078908 | 0.33 | 0.30 | 0.20 | ||||
| 9 | R078909 | 1.64 | 0.25 | 0.25 | ||||
| 10 | R078910 | 1.34 | -0.41 | 0.24 | ||||
| Block R15 | ||||||||
| 1 | R093301 | 0.71 | 1.58 | 0.26 | ||||
| 2 | R093302 | 0.79 | -0.24 | 0.39 | -0.39 | |||
| 3 | R093303 | 1.19 | 1.30 | 0.19 | ||||
| 4 | R093304 | 2.17 | 0.79 | 0.15 | ||||
| 5 | R093305 | 0.62 | 1.63 | 0.25 | ||||
| 6 | R093306 | 1.49 | 0.31 | |||||
| 7 | R093307 | 0.74 | 0.52 | 0.58 | -0.58 | |||
| 8 | R093308 | 1.40 | 0.56 | 0.15 | ||||
| 9 | R093309 | 0.59 | 0.96 | 0.87 | 0.38 | -1.24 | ||
| 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. | ||||||||
| PBA = Paper-based assessment. 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 | 0.68 | 0.45 | 0.17 | ||||
| 3 | R059603 | 1.03 | -0.77 | 0.26 | ||||
| 4 | R059604 | 0.88 | -1.47 | |||||
| 5 | R059610 | 0.42 | -0.34 | 0.16 | -0.01 | -0.15 | ||
| 6 | R059606 | 0.84 | -0.81 | 0.28 | -0.28 | |||
| 7 | R059605 | 0.77 | 0.38 | 0.61 | -0.61 | |||
| 8 | R059608 | 0.57 | -1.02 | 0.28 | ||||
| 9 | R059609 | 0.83 | -2.04 | 0.22 | ||||
| 10 | R059607 | 0.55 | -1.10 | 0.01 | -0.01 | |||
| Block R2 | ||||||||
| 1 | R069801 | 0.60 | -2.98 | |||||
| 2 | R069802 | 0.81 | -0.47 | 0.13 | ||||
| 3 | R069803 | 1.56 | -1.06 | 0.22 | ||||
| 4 | R069804 | 0.95 | -0.41 | 0.77 | -0.77 | |||
| 5 | R069805 | 0.67 | -0.49 | 0.24 | ||||
| 6 | R069806 | 0.55 | -0.34 | 1.57 | 0.12 | -1.69 | ||
| 7 | R069807 | 1.01 | -1.07 | 0.23 | ||||
| 8 | R069808 | 0.83 | -1.31 | 0.23 | ||||
| 9 | R069809 | 0.76 | -1.26 | 0.22 | ||||
| 10 | R069810 | 0.58 | -0.29 | 0.24 | -0.24 | |||
| Block R5 | ||||||||
| 1 | R061601 | 1.44 | -0.90 | 0.30 | ||||
| 2 | R061602 | 0.80 | -0.60 | 0.04 | -0.04 | |||
| 3 | R061603 | 1.00 | -1.47 | 0.20 | ||||
| 4 | R061604 | 0.74 | -0.72 | 1.10 | -1.10 | |||
| 5 | R061605 | 1.18 | -0.10 | 0.24 | ||||
| 6 | R061606 | 0.87 | 0.60 | 0.10 | -0.10 | |||
| 7 | R061607 | 0.77 | 0.02 | 0.79 | 0.41 | -1.20 | ||
| 8 | R061608 | 1.49 | 1.14 | |||||
| 9 | R061609 | 1.41 | 1.16 | 0.23 | ||||
| Block R6 | ||||||||
| 1 | R078901 | 0.79 | 0.56 | 0.18 | ||||
| 2 | R078902 | 0.99 | -1.06 | 0.25 | ||||
| 3 | R078903 | 0.63 | -0.29 | 0.33 | -0.33 | |||
| 4 | R078904 | 0.98 | 1.03 | 0.22 | ||||
| 5 | R078905 | 0.58 | 0.73 | 1.34 | -0.54 | -0.80 | ||
| 6 | R078906 | 1.19 | 0.11 | 0.18 | ||||
| 7 | R078907 | 0.87 | 0.00 | |||||
| 8 | R078908 | 0.33 | -0.19 | 0.17 | ||||
| 9 | R078909 | 1.62 | -0.11 | 0.20 | ||||
| 10 | R078910 | 1.61 | -0.39 | 0.32 | ||||
Last updated 05 December 2023 (SK)