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Block | Item | NAEP ID | aj | bj | cj | dj1 | dj2 | dj3 | dj4 |
---|---|---|---|---|---|---|---|---|---|
M3 | 14 | M047301 | 1.23 | -0.86 | 0.00 | † | † | † | † |
M4 | 7 | M046601 | 1.28 | 0.26 | 0.00 | † | † | † | † |
M5 | 10 | M047001 | 1.58 | 1.31 | 0.21 | † | † | † | † |
M6 | 3 | M017801 | 0.85 | 0.68 | 0.27 | † | † | † | † |
6 | M020201 | 0.60 | -1.19 | 0.00 | † | † | † | † | |
M7 | 3 | M086501 | 0.76 | -1.01 | 0.25 | † | † | † | † |
10 | M040101 | 0.87 | -0.02 | 0.32 | † | † | † | † | |
M8 | 6 | M072301 | 0.61 | -1.14 | 0.06 | † | † | † | † |
13 | M040001 | 0.93 | 0.00 | 0.00 | † | † | † | † | |
M9 | 3 | M043201 | 0.52 | -1.48 | 0.00 | † | † | † | † |
10 | M043101 | 0.95 | 0.00 | 0.21 | † | † | † | † | |
20 | M091401 | 0.39 | 1.47 | † | -2.17 | 2.57 | 0.11 | -0.51 | |
M10 | 16 | N250231 | 0.74 | -0.47 | 0.08 | † | † | † | † |
17 | M066901 | 0.33 | 0.07 | † | -0.98 | -3.09 | 2.44 | 1.64 | |
M11 | 4 | M096001 | 0.75 | 0.58 | 0.00 | † | † | † | † |
6 | M096301 | 1.02 | -1.09 | 0.18 | † | † | † | † | |
16 | M097401 | 1.11 | 0.01 | † | 1.39 | -1.39 | † | † | |
M12 | 10 | M100601 | 0.79 | -1.87 | 0.18 | † | † | † | † |
11 | M100701 | 0.35 | 1.14 | 0.25 | † | † | † | † | |
† Not applicable; c parameters are not estimated for generalized partial credit 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), 2003 Mathematics Assessment. |