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Table of Contents | Search Technical Documentation | References
NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Assessment IRT Parameters → Mathematics Assessment IRT Parameters → IRT Parameters for the Algebra and Functions Scale, by Block and Item, Grade 4 Mathematics National Main Assessment (Accommodations Permitted [R3]): 2000
| Block | Item | NAEP ID | aj | bj | cj | dj1 | dj2 | dj3 | dj4 |
|---|---|---|---|---|---|---|---|---|---|
| M3 | 8 | M039701 | 1.17 | 1.16 | 0.24 | † | † | † | † |
| M4 | 10 | M018301 | 0.96 | 0.90 | 0.12 | † | † | † | † |
| M5 | 14 | M018701 | 1.30 | 2.04 | 0.17 | † | † | † | † |
| M6 | 3 | M066201 | 1.00 | 0.02 | 0.25 | † | † | † | † |
| M7 | 4 | M066301 | 0.41 | -0.35 | 0.00 | -2.37 | 2.37 | † | † |
| M8 | 6 | M066501 | 0.61 | 0.74 | 0.00 | -0.45 | 0.45 | † | † |
| M9 | 7 | M066601 | 0.53 | 0.86 | 0.00 | 0.12 | -0.12 | † | † |
| M10 | 1 | M019701 | 0.54 | -0.56 | 0.00 | † | † | † | † |
| M11 | 8 | M020401 | 0.61 | 0.06 | 0.00 | † | † | † | † |
| M12 | 2 | M067701 | 0.89 | -0.20 | 0.20 | † | † | † | † |
| M13 | 4 | M067901 | 0.54 | 0.91 | 0.00 | -1.90 | 1.90 | † | † |
| M14 | 4 | M010331 | 0.70 | -0.15 | 0.24 | † | † | † | † |
| M15 | 12 | M043501 | 0.30 | 1.06 | 0.00 | 0.97 | -0.18 | 0.06 | -0.86 |
| M16 | 4 | M072201 | 0.44 | -0.58 | 0.00 | -5.88 | 5.88 | † | † |
| M17 | 5 | M072202 | 0.75 | 0.59 | 0.00 | -0.22 | 0.22 | † | † |
| M18 | 10 | M072701 | 0.35 | 1.72 | 0.00 | 0.20 | 0.11 | -0.30 | † |
| M19 | 3 | M074401 | 0.74 | 0.54 | 0.21 | † | † | † | † |
| M20 | 6 | M091001 | 0.71 | -0.53 | 0.15 | † | † | † | † |
| M21 | 7 | M091101 | 0.40 | -0.13 | 0.00 | -0.25 | 0.25 | † | † |
| M22 | 5 | M086801 | 0.89 | -0.40 | 0.16 | † | † | † | † |
| M23 | 9 | M087201 | 0.60 | 2.46 | 0.23 | † | † | † | † |
| † Not applicable; the number of item parameters estimated depends upon the IRT model used for scaling. NOTE: For item j, aj represents the discriminatory power of the item, bj represents a location parameter related to item difficulty, cj represents the guessing parameter, and dji is the category threshold parameter for category i. The c-parameter value is exactly zero for items scaled with the two-parameter logistic model or the generalized partial credit model. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2000 Mathematics Assessment. |
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Last updated 14 July 2008 (KL)
