Block | Item | NAEP ID | aj | bj | cj | dj1 | dj2 | dj3 |
---|---|---|---|---|---|---|---|---|
† 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 represents 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), 2009 Reading Assessment. |
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F3 | 1 | R017101 | 1.11 | -0.29 | † | † | † | † |
2 | R017102 | 0.62 | 0.63 | † | † | † | † | |
3 | R017103 | 0.55 | 0.15 | 0.10 | † | † | † | |
4 | R017104 | 1.19 | 0.65 | † | 0.28 | -0.28 | † | |
5 | R017105 | 0.77 | 0.80 | † | 0.75 | 0.59 | -1.34 | |
6 | R017106 | 0.85 | 1.97 | 0.25 | † | † | † | |
7 | R017107 | 0.48 | 0.77 | † | 0.36 | -0.36 | † | |
8 | R017108 | 1.38 | 1.22 | † | † | † | † | |
9 | R017109 | 0.75 | -0.69 | 0.25 | † | † | † | |
10 | R017110 | 1.32 | 0.07 | † | † | † | † | |
F4 | 1 | R055501 | 0.53 | -1.55 | † | 0.92 | -0.92 | † |
2 | R055601 | 1.17 | 0.05 | 0.40 | † | † | † | |
3 | R055701 | 1.10 | -0.28 | 0.40 | † | † | † | |
4 | R055801 | 0.49 | 0.51 | † | 2.20 | -2.20 | † | |
5 | R055901 | 0.73 | -1.17 | 0.19 | † | † | † | |
6 | R056001 | 0.85 | -0.26 | 0.25 | † | † | † | |
7 | R056101 | 0.56 | -0.01 | † | 1.22 | -0.54 | -0.67 | |
8 | R056201 | 0.92 | -1.29 | 0.19 | † | † | † | |
9 | R056301 | 0.32 | 1.95 | † | -0.09 | 0.09 | † | |
F5 | 1 | R012601 | 0.96 | -0.26 | † | † | † | † |
2 | R012602 | 1.13 | 0.24 | 0.14 | † | † | † | |
3 | R012603 | 1.19 | -0.98 | 0.22 | † | † | † | |
4 | R012604 | 0.80 | 0.01 | † | † | † | † | |
5 | R012605 | 0.62 | -0.10 | 0.25 | † | † | † | |
6 | R012606 | 1.74 | -0.66 | 0.37 | † | † | † | |
7 | R012607 | 0.70 | -0.31 | † | 0.46 | -0.46 | † | |
8 | R012608 | 0.51 | -2.21 | 0.23 | † | † | † | |
9 | R012609 | 1.48 | -0.08 | 0.28 | † | † | † | |
10 | R012610 | 1.79 | -0.51 | 0.41 | † | † | † | |
11 | R012612 | 0.51 | -0.57 | † | † | † | † | |
F9 | 1 | R056501 | 0.85 | -1.04 | † | † | † | † |
2 | R056601 | 1.32 | -1.12 | 0.24 | † | † | † | |
3 | R056701 | 0.67 | -0.93 | 0.31 | † | † | † | |
4 | R056801 | 0.65 | -0.74 | † | 1.20 | -1.20 | † | |
5 | R056901 | 0.91 | -1.11 | 0.10 | † | † | † | |
6 | R057001 | 0.83 | -1.55 | 0.15 | † | † | † | |
7 | R057101 | 0.64 | -0.53 | † | 1.13 | -1.13 | † | |
8 | R057201 | 0.85 | -1.21 | 0.22 | † | † | † | |
9 | R057301 | 0.47 | 0.37 | † | 0.52 | -0.52 | † | |
10 | R057401 | 1.07 | -0.20 | 0.10 | † | † | † | |
F12 | 1 | R053201 | 0.63 | -2.97 | 0.32 | † | † | † |
2 | R053202 | 0.65 | -1.30 | † | † | † | † | |
3 | R053203 | 0.41 | -0.97 | † | 0.74 | -0.74 | † | |
4 | R053204 | 1.04 | 0.02 | 0.21 | † | † | † | |
5 | R053205 | 0.59 | -0.26 | † | 0.06 | 0.45 | -0.51 | |
6 | R053206 | 1.44 | -0.18 | 0.17 | † | † | † | |
7 | R053207 | 0.83 | 0.15 | † | 0.86 | -0.86 | † | |
8 | R053208 | 1.32 | -0.82 | 0.24 | † | † | † | |
9 | R053209 | 0.55 | -0.91 | † | 0.50 | -0.50 | † | |
10 | R053210 | 0.97 | 0.09 | 0.15 | † | † | † | |
R1 | 1 | R059601 | 0.49 | 0.14 | 0.10 | † | † | † |
2 | R059602 | 0.55 | -0.36 | 0.13 | † | † | † | |
3 | R059603 | 0.86 | -0.56 | 0.15 | † | † | † | |
4 | R059604 | 0.71 | -1.48 | † | † | † | † | |
5 | R059610 | 0.38 | -0.07 | † | 0.99 | -1.39 | 0.40 | |
6 | R059606 | 0.66 | -0.60 | † | 0.52 | -0.52 | † | |
7 | R059605 | 0.70 | 0.84 | † | 0.96 | -0.96 | † | |
8 | R059608 | 0.77 | 0.00 | 0.34 | † | † | † | |
9 | R059609 | 0.77 | -1.39 | 0.30 | † | † | † | |
10 | R059607 | 0.51 | -0.70 | † | 0.26 | -0.26 | † | |
R2 | 1 | R059801 | 1.11 | 0.79 | 0.14 | † | † | † |
2 | R059802 | 0.26 | 3.00 | 0.17 | † | † | † | |
3 | R059803 | 0.55 | 0.63 | † | 1.38 | 0.05 | -1.43 | |
4 | R059804 | 0.78 | -0.90 | 0.27 | † | † | † | |
5 | R059805 | 1.04 | -0.18 | 0.39 | † | † | † | |
6 | R059806 | 0.55 | 1.17 | † | -0.17 | 0.17 | † | |
7 | R059807 | 1.21 | 0.82 | † | 1.09 | -1.09 | † | |
8 | R059808 | 1.25 | 0.57 | 0.30 | † | † | † | |
9 | R059809 | 0.88 | -0.12 | † | † | † | † | |
10 | R059810 | 1.24 | 0.24 | 0.28 | † | † | † | |
R5 | 1 | R058501 | 1.23 | -1.09 | 0.21 | † | † | † |
2 | R058502 | 1.23 | -0.62 | 0.22 | † | † | † | |
3 | R058503 | 0.69 | -1.35 | 0.15 | † | † | † | |
4 | R058504 | 0.44 | -1.13 | † | 1.22 | -1.22 | † | |
5 | R058505 | 0.89 | -0.14 | 0.20 | † | † | † | |
6 | R058506 | 0.87 | -0.96 | 0.18 | † | † | † | |
7 | R058507 | 0.63 | -1.23 | 0.12 | † | † | † | |
8 | R058508 | 0.52 | -0.95 | † | 0.44 | -0.19 | -0.25 | |
9 | R058509 | 0.44 | -0.46 | † | † | † | † | |
10 | R058510 | 0.85 | -1.09 | 0.21 | † | † | † | |
R6 | 1 | R058601 | 0.88 | -1.37 | 0.15 | † | † | † |
2 | R058602 | 0.47 | -0.60 | † | 1.37 | -1.37 | † | |
3 | R058603 | 1.06 | -1.11 | 0.32 | † | † | † | |
4 | R058604 | 1.18 | -0.96 | 0.22 | † | † | † | |
5 | R058605 | 0.67 | -1.05 | 0.14 | † | † | † | |
6 | R058606 | 0.56 | -0.44 | † | 0.35 | -0.35 | † | |
7 | R058607 | 1.08 | -0.83 | 0.28 | † | † | † | |
8 | R058608 | 0.54 | -0.19 | † | 1.36 | -0.53 | -0.83 | |
9 | R058609 | 0.75 | -0.54 | 0.15 | † | † | † | |
10 | R058610 | 1.02 | -1.25 | 0.25 | † | † | † | |
R9 | 1 | R060501 | 0.48 | -0.80 | 0.21 | † | † | † |
2 | R060502 | 1.34 | -1.78 | 0.28 | † | † | † | |
3 | R060503 | 0.64 | -0.36 | † | 0.48 | -0.48 | † | |
4 | R060504 | 0.97 | -0.71 | 0.22 | † | † | † | |
5 | R060505 | 0.57 | -0.54 | † | 0.79 | -0.35 | -0.44 | |
6 | R060507 | 0.40 | -0.03 | † | 0.72 | -0.72 | † | |
7 | R060508 | 0.75 | 0.66 | † | 1.41 | -1.41 | † | |
8 | R060509 | 0.52 | -0.61 | † | 0.26 | -0.26 | † | |
9 | R060510 | 0.83 | -1.08 | 0.40 | † | † | † | |
10 | R060511 | 0.87 | -0.82 | 0.33 | † | † | † | |
R10 | 1 | R060701 | 1.18 | -0.58 | 0.32 | † | † | † |
2 | R060702 | 0.81 | -0.16 | 0.23 | † | † | † | |
3 | R060703 | 0.38 | -0.24 | † | 1.28 | -1.28 | † | |
4 | R060704 | 0.47 | -0.03 | † | 0.23 | -0.23 | † | |
5 | R060705 | 0.97 | 0.31 | 0.38 | † | † | † | |
6 | R060706 | 0.71 | -0.07 | † | 2.07 | -1.11 | -0.96 | |
7 | R060707 | 0.38 | -1.12 | † | 0.07 | -0.07 | † | |
8 | R060708 | 0.62 | 0.31 | † | 1.56 | -1.56 | † | |
9 | R060709 | 1.16 | 0.02 | 0.21 | † | † | † |