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NAEP Analysis and Scaling → Estimation of NAEP Score Scales → Item Response Theory Parameters → Mathematics Assessment Item Response Theory Parameters → IRT Parameters for Items in the Number Sense, Properties, and Operations Scale, by Block and Item, Grade 12 Mathematics National Main Assessment: 2005
| Block | Item | NAEP ID | aj | bj | cj | dj1 | dj2 | dj3 | dj4 |
|---|---|---|---|---|---|---|---|---|---|
| † Not applicable; c parameters are not estimated for generalized partial credit models, and d parameters are not estimated for two-parameter or three-parameter logistic models. 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. For item j, dji may not sum to zero because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2005 Mathematics Assessment. |
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| M3 | 8 | M094901 | 1.24 | -0.30 | 0.13 | † | † | † | † |
| 9 | M095001 | 0.63 | -0.19 | † | -0.67 | 0.67 | † | † | |
| 14 | M056801 | 1.50 | 0.94 | 0.00 | † | † | † | † | |
| M4 | 3 | M071503 | 0.86 | 0.18 | 0.19 | † | † | † | † |
| 4 | M071601 | 0.96 | -0.12 | 0.20 | † | † | † | † | |
| 9 | M059001 | 1.14 | 0.15 | 0.14 | † | † | † | † | |
| 14 | M059601 | 1.54 | 1.10 | 0.10 | † | † | † | † | |
| M5 | 5 | M021401 | 1.07 | -0.26 | 0.00 | † | † | † | † |
| 7 | M094501 | 0.78 | 0.02 | 0.19 | † | † | † | † | |
| 11 | M056601 | 1.33 | 1.00 | 0.13 | † | † | † | † | |
| 12 | M056501 | 1.61 | 1.13 | 0.20 | † | † | † | † | |
| M6 | 1 | M130901 | 0.91 | -1.15 | 0.21 | † | † | † | † |
| 4 | M131301 | 0.72 | 0.43 | 0.23 | † | † | † | † | |
| M7 | 3 | M076101 | 0.56 | -1.73 | † | 0.88 | -0.88 | † | † |
| 6 | M073801 | 0.71 | 0.45 | † | -1.30 | 1.30 | † | † | |
| M8 | 1 | M012231 | 0.79 | -2.50 | 0.18 | † | † | † | † |
| 2 | M012431 | 0.62 | -1.56 | 0.16 | † | † | † | † | |
| 3 | M073001 | 1.06 | -1.07 | 0.16 | † | † | † | † | |
| 5 | M073101 | 0.62 | -0.20 | 0.19 | † | † | † | † | |
| 14 | M092501 | 0.56 | 1.11 | 0.29 | † | † | † | † | |
| 15 | M071201 | 0.55 | 0.90 | † | -0.89 | 0.89 | † | † | |
| 21 | M071401 | 0.34 | 1.60 | † | -4.82 | 0.74 | 1.34 | 2.73 | |
| M9 | 1 | M059201 | 1.02 | -1.08 | 0.17 | † | † | † | † |
| 2 | M052401 | 0.51 | -0.31 | 0.00 | † | † | † | † | |
| 7 | M076201 | 0.61 | 0.05 | 0.25 | † | † | † | † | |
| 12 | M074001 | 1.32 | 0.41 | † | 0.02 | -0.02 | † | † | |
| M10 | 2 | M058601 | 0.83 | -0.52 | 0.19 | † | † | † | † |
| M11 | 1 | M125901 | 1.15 | 0.74 | 0.16 | † | † | † | † |
| 3 | M126301 | 1.12 | -0.24 | 0.20 | † | † | † | † | |
| M12 | 3 | M134601 | 1.55 | 0.98 | 0.00 | † | † | † | † |
| 13 | M135301 | 1.78 | 0.55 | 0.22 | † | † | † | † | |
Last updated 27 July 2009 (JL)
