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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 4 Meaning Vocabulary Combined National and State Assessment, By Item and Block: 2013
| Block | Item1 | NAEP ID | aj | bj | cj |
|---|---|---|---|---|---|
|
11 The table includes meaning vocabulary items from the half-blocks and the meaning vocabulary items embedded within the 25-minute reading comprehension blocks. NOTE: 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), 2013 Reading Assessment. | |||||
| R1 | 2 | R068902 | 0.83 | 1.55 | .28 |
| 8 | R068908 | 1.39 | -0.75 | .25 | |
| R2 | 2 | R057802 | 0.94 | -0.29 | .26 |
| 8 | R057808 | 0.76 | 0.55 | .19 | |
| R3 | 9 | R068709 | 0.71 | 1.38 | .31 |
| 10 | R068710 | 0.70 | 0.72 | .17 | |
| R4 | 3 | R070203 | 1.02 | -0.65 | .22 |
| 9 | R070209 | 0.94 | -0.05 | .20 | |
| R5 | 2 | R058502 | 0.87 | 0.38 | .20 |
| 3 | R058503 | 0.87 | 0.39 | .19 | |
| R6 | 5 | R058605 | 0.98 | 0.46 | .17 |
| 10 | R058610 | 1.19 | -0.13 | .23 | |
| R7 | 2 | R058802 | 1.06 | -0.64 | .19 |
| 8 | R058808 | 1.28 | 0.76 | .27 | |
| R8 | 2 | R059102 | 1.01 | -0.87 | .08 |
| 4 | R059104 | 1.55 | -0.93 | .11 | |
| R9 | 6 | R058306 | 1.35 | 0.87 | .30 |
| 8 | R058308 | 1.74 | 0.21 | .18 | |
| R10 | 3 | R069303 | 0.40 | -0.30 | .17 |
| 6 | R069307 | 1.31 | 1.32 | .21 | |
| R14 | 1 | R0V2001 | 0.68 | 1.02 | .08 |
| 2 | R0V2002 | 0.71 | -0.43 | .18 | |
| 3 | R0V2003 | 1.34 | -0.97 | .19 | |
| 4 | R0V2004 | 1.60 | 0.03 | .19 | |
| 5 | R0V2005 | 1.17 | 0.12 | .20 | |
| R15 | 1 | R0V0101 | 1.08 | 0.23 | .13 |
| 2 | R0V0102 | 1.67 | 1.30 | .34 | |
| 3 | R0V0103 | 0.59 | 0.57 | .12 | |
| 4 | R0V0104 | 1.41 | -0.59 | .12 | |
| 5 | R0V0105 | 1.05 | -0.33 | .19 | |
| R16 | 1 | R0V0206 | 1.16 | -0.76 | .12 |
| 2 | R0V0207 | 1.55 | -0.50 | .15 | |
| 3 | R0V0208 | 1.85 | -0.54 | .21 | |
| 4 | R0V0209 | 1.17 | -0.08 | .19 | |
| 5 | R0V0210 | 1.42 | -0.29 | .18 | |
| R17 | 1 | R0V0306 | 1.76 | 0.44 | .27 |
| 2 | R0V0307 | 1.71 | 0.08 | .16 | |
| 3 | R0V0308 | 0.26 | 0.60 | .12 | |
| 4 | R0V0309 | 1.35 | -0.10 | .20 | |
| 5 | R0V0310 | 0.94 | 0.93 | .20 | |
Last updated 21 May 2017 (DC)