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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F6 | 1 | R013201 | 0.61 | 0.09 | † | 1.11 | -0.06 | -1.05 |
2 | R013202 | 0.71 | -1.53 | 0.16 | † | † | † | |
3 | R013203 | 0.97 | -2.49 | † | † | † | † | |
4 | R013204 | 0.84 | -1.55 | 0.19 | † | † | † | |
5 | R013205 | 0.87 | -2.19 | † | † | † | † | |
6 | R013206 | 0.72 | -0.77 | 0.19 | † | † | † | |
7 | R013207 | 0.64 | -1.40 | † | † | † | † | |
8 | R013208 | 1.29 | -1.32 | 0.19 | † | † | † | |
9 | R013209 | 0.62 | 0.60 | † | † | † | † | |
10 | R013210 | 0.63 | 1.15 | 0.24 | † | † | † | |
11 | R013211 | 0.34 | -0.45 | † | † | † | † | |
12 | R013212 | 0.45 | 1.00 | † | 1.98 | -0.64 | -1.34 | |
F7 | 1 | R013701 | 0.43 | -0.03 | † | † | † | † |
2 | R013702 | 0.51 | -0.32 | † | † | † | † | |
3 | R013703 | 0.78 | -1.87 | 0.23 | † | † | † | |
4 | R013704 | 0.71 | 1.79 | † | † | † | † | |
5 | R013705 | 1.16 | -1.37 | 0.23 | † | † | † | |
6 | R013706 | 0.56 | -0.42 | † | † | † | † | |
7 | R013707 | 0.78 | -0.19 | 0.15 | † | † | † | |
8 | R013708 | 0.26 | 0.68 | † | † | † | † | |
9 | R013709 | 0.39 | 0.99 | 0.17 | † | † | † | |
10 | R013710 | 0.64 | 1.20 | † | † | † | † | |
11 | R013711 | 0.48 | 1.01 | 0.29 | † | † | † | |
12 | R013712 | 0.60 | 0.25 | † | † | † | † | |
F8 | 1 | R053501 | 0.62 | -0.05 | † | 1.23 | -1.23 | † |
2 | R053502 | 0.63 | -2.36 | 0.36 | † | † | † | |
3 | R053503 | 0.71 | -0.05 | 0.11 | † | † | † | |
4 | R053504 | 0.92 | -1.29 | † | † | † | † | |
5 | R053505 | 1.14 | -0.46 | 0.38 | † | † | † | |
6 | R053506 | 0.83 | 0.24 | 0.22 | † | † | † | |
7 | R053507 | 0.58 | 0.01 | † | 0.11 | 0.43 | -0.54 | |
8 | R053508 | 1.68 | -0.21 | 0.33 | † | † | † | |
9 | R053509 | 0.82 | -0.93 | † | † | † | † | |
10 | R053510 | 1.37 | 0.22 | 0.30 | † | † | † | |
F9 | 1 | R053301 | 0.87 | -3.30 | † | † | † | † |
2 | R053302 | 1.11 | -0.70 | 0.19 | † | † | † | |
3 | R053303 | 0.90 | -0.67 | † | † | † | † | |
4 | R053304 | 1.19 | -1.73 | 0.40 | † | † | † | |
5 | R053305 | 0.75 | -0.64 | † | -0.12 | 0.12 | † | |
6 | R053306 | 1.12 | -0.42 | 0.21 | † | † | † | |
7 | R053307 | 1.55 | -1.03 | 0.26 | † | † | † | |
8 | R053308 | 1.19 | -0.70 | 0.25 | † | † | † | |
9 | R053309 | 0.89 | 0.36 | † | † | † | † | |
F10 | 1 | R013401 | 0.98 | -0.30 | 0.14 | † | † | † |
2 | R013402 | 0.79 | -0.79 | † | † | † | † | |
3 | R013403 | 0.45 | -0.02 | † | -1.95 | 1.95 | † | |
4 | R013404 | 0.86 | -0.99 | 0.35 | † | † | † | |
5 | R013405 | 1.06 | -0.90 | † | † | † | † | |
6 | R013406 | 0.60 | 0.21 | † | † | † | † | |
7 | R013407 | 0.60 | -0.77 | † | † | † | † | |
8 | R013408 | 0.68 | -0.60 | 0.15 | † | † | † | |
9 | R013409 | 0.73 | -1.19 | † | † | † | † | |
10 | R013410 | 0.97 | -1.16 | 0.30 | † | † | † | |
11 | R013411 | 0.57 | -1.42 | † | † | † | † | |
12 | R013413 | 0.51 | -0.52 | † | † | † | † | |
F11 | 1 | R019301 | 0.42 | 0.71 | † | 0.00 | 0.00 | † |
2 | R019401 | 1.12 | 0.32 | † | 0.61 | -0.61 | † | |
3 | R019501 | 0.60 | -0.48 | † | † | † | † | |
4 | R019601 | 1.43 | 0.34 | 0.17 | † | † | † | |
5 | R019701 | 0.93 | 0.46 | † | † | † | † | |
6 | R019801 | 0.62 | -0.07 | 0.33 | † | † | † | |
7 | R019901 | 1.58 | -0.07 | 0.13 | † | † | † | |
8 | R020001 | 0.51 | -0.40 | † | 0.80 | -0.80 | † | |
9 | R020101 | 0.97 | -0.50 | 0.33 | † | † | † | |
10 | R020201 | 0.95 | -0.47 | † | † | † | † | |
R3 | 1 | R060101 | 0.66 | -0.98 | 0.30 | † | † | † |
2 | R060102 | 1.09 | -0.67 | 0.30 | † | † | † | |
3 | R060103 | 0.61 | -1.21 | † | † | † | † | |
4 | R060104 | 0.80 | -1.62 | 0.27 | † | † | † | |
5 | R060105 | 0.77 | -0.77 | † | † | † | † | |
6 | R060106 | 1.13 | -0.89 | 0.20 | † | † | † | |
7 | R060107 | 1.05 | 0.04 | 0.24 | † | † | † | |
8 | R060108 | 0.57 | -0.23 | † | 0.10 | 0.57 | -0.67 | |
9 | R060109 | 0.75 | -0.36 | 0.16 | † | † | † | |
10 | R060110 | 0.60 | 0.42 | 0.29 | † | † | † | |
R4 | 1 | R060301 | 0.59 | -1.81 | † | † | † | † |
2 | R060302 | 1.04 | -1.11 | 0.23 | † | † | † | |
3 | R060304 | 0.95 | -1.01 | 0.32 | † | † | † | |
4 | R060305 | 0.66 | 0.77 | † | 1.89 | -1.89 | † | |
5 | R060303 | 1.32 | -0.13 | 0.20 | † | † | † | |
6 | R060306 | 0.73 | 0.46 | † | 1.31 | -1.31 | † | |
7 | R060307 | 0.66 | -0.49 | 0.23 | † | † | † | |
8 | R060308 | 0.79 | -0.06 | 0.22 | † | † | † | |
9 | R060309 | 0.41 | -0.64 | † | † | † | † | |
10 | R060310 | 1.43 | -0.30 | 0.25 | † | † | † | |
R7 | 1 | R062201 | 0.76 | -2.07 | 0.25 | † | † | † |
2 | R062202 | 0.92 | -0.52 | 0.38 | † | † | † | |
3 | R062203 | 0.93 | -0.55 | † | † | † | † | |
4 | R062204 | 0.63 | -1.09 | 0.33 | † | † | † | |
5 | R062205 | 0.79 | 0.16 | † | † | † | † | |
6 | R062206 | 0.83 | -0.28 | 0.16 | † | † | † | |
7 | R062207 | 0.68 | 0.15 | † | 1.31 | -1.03 | -0.27 | |
8 | R062208 | 0.42 | -0.75 | 0.21 | † | † | † | |
9 | R062209 | 1.12 | 0.13 | 0.30 | † | † | † | |
10 | R062210 | 0.84 | 0.81 | † | 1.38 | -1.38 | † | |
11 | R062211 | 1.14 | -0.72 | 0.26 | † | † | † | |
R8 | 1 | R062301 | 1.21 | -0.76 | 0.22 | † | † | † |
2 | R062302 | 1.21 | -1.18 | 0.37 | † | † | † | |
3 | R062303 | 0.76 | 1.04 | † | 1.11 | -1.11 | † | |
4 | R062304 | 1.02 | 0.45 | † | 0.86 | -0.86 | † | |
5 | R062305 | 1.25 | -0.55 | 0.26 | † | † | † | |
6 | R062307 | 1.05 | -0.17 | 0.43 | † | † | † | |
7 | R062308 | 0.51 | 0.55 | † | -0.46 | 1.59 | -1.12 | |
8 | R062309 | 1.30 | -0.60 | 0.30 | † | † | † | |
9 | R062310 | 1.45 | 0.12 | 0.33 | † | † | † | |
10 | R062311 | 0.68 | -0.38 | † | 0.06 | -0.06 | † | |
R9 | 1 | R062501 | 0.91 | -1.12 | † | 0.47 | -0.47 | † |
2 | R062502 | 1.02 | -0.12 | 0.32 | † | † | † | |
3 | R062511 | 1.25 | -0.14 | 0.30 | † | † | † | |
4 | R062505 | 0.63 | 0.29 | † | 1.01 | -1.01 | † | |
5 | R062507 | 1.07 | 0.12 | 0.34 | † | † | † | |
6 | R062508 | 0.53 | 0.17 | † | 0.95 | -0.22 | -0.73 | |
7 | R062509 | 1.07 | 0.94 | 0.27 | † | † | † | |
8 | R062503 | 0.63 | 0.32 | † | 0.42 | -0.42 | † | |
9 | R062510 | 0.74 | -0.11 | 0.26 | † | † | † | |
R10 | 1 | R062701 | 1.20 | -0.74 | 0.15 | † | † | † |
2 | R062702 | 0.76 | -0.13 | 0.22 | † | † | † | |
3 | R062703 | 0.46 | -0.82 | 0.28 | † | † | † | |
4 | R062704 | 1.08 | 0.42 | 0.32 | † | † | † | |
5 | R062705 | 0.80 | 0.28 | † | 0.90 | -0.90 | † | |
6 | R062706 | 0.66 | 0.30 | † | 0.74 | -0.08 | -0.66 | |
7 | R062707 | 1.49 | -0.22 | 0.33 | † | † | † | |
8 | R062708 | 0.80 | -0.78 | † | † | † | † | |
9 | R062709 | 1.00 | 0.79 | 0.42 | † | † | † | |
10 | R062710 | 0.77 | 0.54 | † | 0.55 | -0.55 | † | |
R11 | 1 | R062901 | 1.59 | -0.47 | 0.32 | † | † | † |
2 | R062902 | 0.51 | 0.11 | † | 0.91 | -0.91 | † | |
3 | R062903 | 0.57 | 0.53 | † | 0.97 | -0.97 | † | |
4 | R062904 | 0.46 | -0.67 | 0.23 | † | † | † | |
5 | R062905 | 0.80 | 0.16 | 0.27 | † | † | † | |
6 | R062908 | 0.64 | 0.40 | † | 0.70 | -0.66 | -0.05 | |
7 | R062906 | 1.22 | 0.93 | 0.12 | † | † | † | |
8 | R062907 | 0.48 | -0.17 | 0.25 | † | † | † | |
9 | R062909 | 0.58 | 0.66 | † | 0.31 | -0.31 | † | |
10 | R062910 | 1.16 | -1.13 | 0.30 | † | † | † | |
R12 | 1 | R063102 | 1.39 | -1.07 | 0.51 | † | † | † |
2 | R063103 | 1.38 | 0.18 | 0.30 | † | † | † | |
3 | R063101 | 0.79 | -0.20 | † | 0.56 | -0.56 | † | |
4 | R063104 | 0.93 | -0.88 | 0.22 | † | † | † | |
5 | R063105 | 0.68 | 0.56 | † | 1.13 | -0.83 | -0.30 | |
6 | R063106 | 0.98 | -0.83 | 0.23 | † | † | † | |
7 | R063801 | 0.46 | -0.34 | † | 0.06 | -0.06 | † | |
8 | R063802 | 1.30 | -0.21 | 0.30 | † | † | † | |
9 | R063108 | 1.41 | -0.55 | 0.33 | † | † | † | |
10 | R063109 | 0.73 | -0.27 | † | -1.70 | 1.70 | † | |
11 | R063110 | 0.90 | 0.36 | 0.27 | † | † | † | |
R13 | 1 | R063201 | 0.94 | -1.74 | 0.26 | † | † | † |
2 | R063901 | 1.00 | -0.45 | 0.19 | † | † | † | |
3 | R063203 | 1.23 | -0.78 | 0.21 | † | † | † | |
4 | R063204 | 0.75 | -0.35 | † | 0.19 | -0.19 | † | |
5 | R063902 | 1.02 | 1.09 | 0.16 | † | † | † | |
6 | R063206 | 1.06 | -0.90 | 0.33 | † | † | † | |
7 | R063207 | 0.58 | -0.61 | † | 0.39 | 0.11 | -0.49 | |
8 | R063210 | 0.58 | 1.04 | † | 1.68 | -1.68 | † | |
9 | R063209 | 1.04 | -0.95 | 0.31 | † | † | † | |
10 | R063208 | 0.63 | 0.03 | † | 0.75 | -0.75 | † |