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Table of Contents | Search Technical Documentation | References
NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Assessment IRT Parameters → Reading Assessment IRT Parameters → IRT Parameters for Items in the Grade 12 Vocabulary National Assessment, by Item and Block: 2015
NAEP Technical DocumentationIRT Parameters for Items in the Grade 12 Vocabulary National Assessment, by Item and Block: 2015
| Block | Item | NAEP ID | aj | bj | cj | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| R1 | 2 | R059602 | 0.71 | -0.88 | 0.20 | |||||
| 8 | R059608 | 0.75 | -1.05 | 0.21 | ||||||
| R2 | 8 | R069808 | 1.08 | -1.34 | 0.19 | |||||
| 9 | R069809 | 0.81 | -1.42 | 0.18 | ||||||
| R3 | 2 | R060102 | 0.91 | -0.85 | 0.24 | |||||
| 9 | R060109 | 0.85 | -0.21 | 0.19 | ||||||
| R4 | 2 | R080002 | 0.86 | -0.26 | 0.19 | |||||
| 8 | R080008 | 0.88 | 0.97 | 0.26 | ||||||
| R5 | 1 | R061601 | 1.29 | -1.28 | 0.17 | |||||
| 3 | R061603 | 1.14 | -1.56 | 0.17 | ||||||
| R6 | 6 | R078906 | 0.98 | -0.05 | 0.17 | |||||
| 9 | R078909 | 1.21 | -0.33 | 0.19 | ||||||
| R7 | 4 | R062204 | 0.75 | -1.22 | 0.21 | |||||
| 8 | R062208 | 0.46 | -0.55 | 0.22 | ||||||
| R8 | 5 | R062305 | 1.36 | -0.72 | 0.17 | |||||
| 9 | R062310 | 1.18 | -0.24 | 0.21 | ||||||
| R9 | 3 | R062511 | 1.25 | -0.35 | 0.22 | |||||
| 9 | R062510 | 0.68 | -0.34 | 0.19 | ||||||
| R10 | 3 | R062703 | 0.36 | -1.42 | 0.21 | |||||
| 9 | R062709 | 0.66 | 0.28 | 0.25 | ||||||
| R11 | 2 | R062802 | 0.94 | 0.23 | 0.21 | |||||
| 11 | R062811 | 1.33 | 0.29 | 0.20 | ||||||
| R12 | 2 | R063103 | 1.31 | -0.27 | 0.20 | |||||
| 6 | R063106 | 0.82 | -1.10 | 0.18 | ||||||
| R13 | 4 | R079104 | 1.53 | 1.09 | 0.21 | |||||
| 8 | R079108 | 1.10 | 0.12 | 0.19 | ||||||
| 9 | R079109 | 0.92 | -1.38 | 0.21 | ||||||
| R14 | 1 | R0V0401 | 2.11 | 0.21 | 0.28 | |||||
| 2 | R0V0402 | 1.28 | -1.31 | 0.23 | ||||||
| 3 | R0V0403 | 0.82 | -0.46 | 0.17 | ||||||
| 4 | R0V0404 | 0.75 | 0.36 | 0.28 | ||||||
| 5 | R0V0405 | 0.75 | -0.20 | 0.14 | ||||||
| 6 | R0V0406 | 0.76 | 0.24 | 0.27 | ||||||
| R15 | 1 | R0V0506 | 1.07 | -0.77 | 0.16 | |||||
| 2 | R0V0507 | 0.52 | 0.60 | 0.19 | ||||||
| 3 | R0V0508 | 0.80 | -1.32 | 0.17 | ||||||
| 4 | R0V0509 | 0.62 | -0.49 | 0.21 | ||||||
| 5 | R0V0510 | 1.55 | 0.02 | 0.23 | ||||||
| R16 | 1 | R0V1501 | 1.00 | -0.77 | 0.23 | |||||
| 2 | R0V1502 | 0.97 | -0.78 | 0.16 | ||||||
| 3 | R0V1503 | 0.78 | -0.94 | 0.21 | ||||||
| 4 | R0V1504 | 0.88 | -0.12 | 0.14 | ||||||
| 5 | R0V1505 | 1.65 | -0.69 | 0.20 | ||||||
| 6 | R0V1506 | 1.63 | -0.51 | 0.20 | ||||||
| R17 | 1 | R0V1401 | 0.87 | -0.16 | 0.19 | |||||
| 2 | R0V1402 | 0.56 | -0.80 | 0.17 | ||||||
| 3 | R0V1403 | 1.00 | -0.56 | 0.14 | ||||||
| 4 | R0V1404 | 0.83 | -0.86 | 0.18 | ||||||
| 5 | R0V1407 | 1.10 | 0.96 | 0.20 | ||||||
| NOTE: The vocabulary assessment includes multiple-choice items only. The table includes vocabulary items from the half-blocks and the vocabulary items embedded within the 25-minute reading comprehension blocks. For item
j, aj represents the discriminatory power of the item, bj represents a location parameter related to item difficulty, and cj represents the guessing parameter. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2015 Reading Assessment. | ||||||||||
Last updated 17 November 2021 (ML)