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 | R053601 | 1.39 | -0.95 | 0.25 | † | † | † |
2 | R053701 | 0.84 | -1.52 | 0.20 | † | † | † | |
3 | R053801 | 0.95 | -1.03 | 0.27 | † | † | † | |
4 | R053901 | 0.73 | 0.39 | † | 1.21 | -1.21 | † | |
5 | R054001 | 0.63 | -0.57 | † | 1.55 | -1.55 | † | |
6 | R054101 | 0.88 | 0.03 | 0.32 | † | † | † | |
7 | R054201 | 0.61 | -0.06 | † | 1.03 | 0.01 | -1.04 | |
8 | R054301 | 0.67 | 0.78 | † | 1.19 | -1.19 | † | |
9 | R054401 | 1.02 | -0.73 | 0.29 | † | † | † | |
10 | R054501 | 0.59 | -0.68 | 0.26 | † | † | † | |
F4 | 1 | R052901 | 1.30 | -1.26 | 0.43 | † | † | † |
2 | R052902 | 0.85 | -0.38 | 0.25 | † | † | † | |
3 | R052903 | 1.46 | -0.41 | 0.22 | † | † | † | |
4 | R052904 | 0.69 | -0.49 | † | -0.04 | 0.04 | † | |
5 | R052905 | 1.80 | -0.36 | 0.26 | † | † | † | |
6 | R052906 | 0.81 | -0.35 | † | † | † | † | |
7 | R052907 | 0.62 | -0.20 | † | 1.24 | -0.14 | -1.11 | |
8 | R052908 | 1.48 | -0.55 | 0.22 | † | † | † | |
9 | R052909 | 0.89 | -0.79 | † | † | † | † | |
10 | R052910 | 1.25 | -0.48 | 0.28 | † | † | † | |
F5 | 1 | R012601 | 0.75 | 1.02 | † | † | † | † |
2 | R012602 | 1.23 | 1.23 | 0.17 | † | † | † | |
3 | R012603 | 1.29 | -0.15 | 0.19 | † | † | † | |
4 | R012604 | 0.99 | 1.10 | † | † | † | † | |
5 | R012605 | 0.65 | 0.86 | 0.24 | † | † | † | |
6 | R012606 | 1.46 | 0.24 | 0.36 | † | † | † | |
7 | R012607 | 0.78 | 1.19 | † | 1.06 | -0.31 | -0.74 | |
8 | R012608 | 0.46 | -1.38 | 0.23 | † | † | † | |
9 | R012609 | 1.05 | 0.89 | 0.29 | † | † | † | |
10 | R012610 | 1.43 | 0.37 | 0.34 | † | † | † | |
11 | R012612 | 0.56 | 0.45 | † | † | † | † | |
F9 | 1 | R053001 | 0.59 | -2.18 | 0.18 | † | † | † |
2 | R053002 | 1.48 | -0.90 | 0.39 | † | † | † | |
3 | R053003 | 0.93 | -0.84 | † | † | † | † | |
4 | R053004 | 0.61 | -0.74 | † | 0.41 | -0.41 | † | |
5 | R053005 | 0.64 | -1.17 | 0.17 | † | † | † | |
6 | R053006 | 0.43 | -0.20 | † | 0.13 | -0.20 | 0.07 | |
7 | R053007 | 0.67 | -2.02 | 0.12 | † | † | † | |
8 | R053008 | 0.73 | -1.44 | 0.23 | † | † | † | |
9 | R053009 | 0.67 | -1.24 | † | † | † | † | |
10 | R053010 | 0.59 | -1.72 | † | † | † | † | |
F11 | 1 | R021601 | 0.53 | -1.61 | 0.19 | † | † | † |
2 | R020401 | 0.74 | -1.98 | † | † | † | † | |
3 | R020601 | 1.29 | -1.58 | 0.20 | † | † | † | |
4 | R021101 | 0.51 | -1.87 | 0.07 | † | † | † | |
5 | R020701 | 0.88 | -0.91 | † | † | † | † | |
6 | R020501 | 0.92 | 0.17 | 0.12 | † | † | † | |
7 | R022101 | 1.51 | -1.15 | 0.19 | † | † | † | |
8 | R021701 | 0.45 | 0.30 | † | 1.33 | -1.33 | † | |
9 | R022201 | 1.18 | -1.69 | 0.32 | † | † | † | |
10 | R021201 | 0.36 | -1.28 | † | 0.32 | -0.32 | † | |
R1 | 1 | R057701 | 0.60 | 0.20 | 0.27 | † | † | † |
2 | R057702 | 0.70 | -1.59 | 0.18 | † | † | † | |
3 | R057703 | 1.35 | -1.34 | 0.30 | † | † | † | |
4 | R057704 | 0.68 | -0.53 | † | † | † | † | |
5 | R057705 | 0.51 | -0.53 | † | 0.77 | -0.77 | † | |
6 | R057706 | 0.67 | -0.28 | † | 0.88 | -0.88 | † | |
7 | R057707 | 0.51 | 0.92 | † | 0.82 | -0.07 | -0.75 | |
8 | R057708 | 0.84 | 0.08 | 0.17 | † | † | † | |
9 | R057709 | 0.62 | -1.10 | 0.20 | † | † | † | |
10 | R057710 | 0.65 | 0.08 | † | 1.00 | -1.00 | † | |
11 | R057711 | 1.17 | 0.70 | 0.19 | † | † | † | |
R2 | 1 | R057801 | 1.18 | -1.04 | 0.36 | † | † | † |
2 | R057802 | 1.13 | -0.20 | 0.28 | † | † | † | |
4 | R057804 | 0.91 | -0.62 | 0.28 | † | † | † | |
5 | R057805 | 0.50 | -0.49 | 0.17 | † | † | † | |
6 | R057806 | 0.50 | 0.37 | † | 1.99 | 0.28 | -2.27 | |
7 | R057807 | 0.75 | -1.25 | † | † | † | † | |
8 | R057808 | 0.98 | 0.83 | 0.28 | † | † | † | |
9 | R057809 | 0.54 | 0.24 | † | 1.61 | -1.61 | † | |
R3 | 1 | R058001 | 0.95 | 0.15 | 0.22 | † | † | † |
2 | R058002 | 1.00 | 0.22 | 0.26 | † | † | † | |
3 | R058003 | 0.63 | -0.05 | † | 1.24 | -1.24 | † | |
4 | R058004 | 0.52 | -0.49 | † | 0.85 | -0.85 | † | |
5 | R058005 | 0.86 | -0.28 | 0.21 | † | † | † | |
6 | R058006 | 0.43 | 0.61 | † | 1.07 | -1.27 | 0.19 | |
7 | R058007 | 0.71 | -0.20 | † | † | † | † | |
8 | R058008 | 0.49 | 1.01 | † | 1.46 | -1.46 | † | |
9 | R058009 | 0.71 | 0.79 | 0.24 | † | † | † | |
10 | R058010 | 1.04 | 0.04 | 0.27 | † | † | † | |
R5 | 1 | R058501 | 1.15 | 0.23 | 0.15 | † | † | † |
2 | R058502 | 1.38 | 0.57 | 0.28 | † | † | † | |
3 | R058503 | 1.07 | 0.63 | 0.26 | † | † | † | |
4 | R058504 | 0.44 | 0.10 | † | 1.22 | -1.22 | † | |
5 | R058505 | 1.20 | 0.92 | 0.13 | † | † | † | |
6 | R058506 | 0.80 | 0.16 | 0.25 | † | † | † | |
7 | R058507 | 0.98 | 0.57 | 0.26 | † | † | † | |
8 | R058508 | 0.55 | 0.38 | † | 0.60 | 0.17 | -0.77 | |
9 | R058509 | 0.62 | 0.90 | † | † | † | † | |
10 | R058510 | 0.78 | 0.17 | 0.21 | † | † | † | |
R6 | 1 | R058601 | 1.06 | -0.03 | 0.17 | † | † | † |
2 | R058602 | 0.61 | 0.66 | † | 0.69 | -0.69 | † | |
3 | R058603 | 1.02 | -0.14 | 0.35 | † | † | † | |
4 | R058604 | 1.16 | 0.14 | 0.23 | † | † | † | |
5 | R058605 | 1.23 | 0.57 | 0.19 | † | † | † | |
6 | R058606 | 0.58 | 1.01 | † | 0.52 | -0.52 | † | |
7 | R058607 | 1.37 | 0.30 | 0.34 | † | † | † | |
8 | R058608 | 0.58 | 1.10 | † | 1.51 | -0.55 | -0.96 | |
9 | R058609 | 0.85 | 0.35 | 0.15 | † | † | † | |
10 | R058610 | 1.41 | 0.10 | 0.27 | † | † | † |