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 | 0.71 | 0.75 | † | 1.14 | -0.10 | -1.05 |
2 | R013202 | 0.72 | -0.71 | 0.21 | † | † | † | |
3 | R013203 | 1.05 | -2.03 | † | † | † | † | |
4 | R013204 | 1.03 | -0.33 | 0.31 | † | † | † | |
5 | R013205 | 0.98 | -1.53 | † | † | † | † | |
6 | R013206 | 0.75 | -0.10 | 0.19 | † | † | † | |
7 | R013207 | 0.60 | -0.90 | † | † | † | † | |
8 | R013208 | 1.62 | -0.33 | 0.22 | † | † | † | |
9 | R013209 | 0.69 | 1.17 | † | † | † | † | |
10 | R013210 | 0.90 | 2.20 | 0.36 | † | † | † | |
11 | R013211 | 0.43 | 0.22 | † | † | † | † | |
12 | R013212 | 0.50 | 1.43 | † | 1.59 | -0.77 | -0.83 | |
F7 | 1 | R034501 | 0.92 | -0.57 | 0.36 | † | † | † |
2 | R034601 | 0.22 | -1.93 | † | -1.81 | 1.81 | † | |
3 | R034701 | 0.25 | -1.54 | 0.24 | † | † | † | |
4 | R034801 | 1.22 | -1.70 | 0.39 | † | † | † | |
5 | R034901 | 0.62 | -0.64 | † | 0.90 | -0.90 | † | |
6 | R035001 | 0.49 | -1.29 | † | 0.72 | -0.72 | † | |
7 | R035101 | 0.93 | -0.26 | 0.25 | † | † | † | |
8 | R035201 | 0.51 | -0.82 | † | -1.40 | 1.40 | † | |
9 | R035301 | 0.45 | -0.41 | † | 1.16 | 0.10 | -1.27 | |
10 | R035401 | 1.01 | -1.44 | 0.51 | † | † | † | |
F8 | 1 | R053401 | 0.43 | -0.09 | † | 0.73 | -0.73 | † |
2 | R053402 | 0.77 | -2.02 | † | † | † | † | |
3 | R053403 | 1.61 | -0.80 | 0.32 | † | † | † | |
4 | R053404 | 0.84 | 0.38 | 0.20 | † | † | † | |
5 | R053405 | 0.44 | -0.68 | † | 1.98 | -1.85 | -0.13 | |
6 | R053406 | 1.32 | -0.88 | 0.23 | † | † | † | |
7 | R053407 | 0.99 | -1.47 | 0.29 | † | † | † | |
8 | R053408 | 0.38 | -1.86 | † | † | † | † | |
9 | R053409 | 0.70 | -0.33 | 0.33 | † | † | † | |
10 | R053410 | 0.39 | -1.26 | † | † | † | † | |
11 | R053411 | 1.20 | -0.16 | 0.34 | † | † | † | |
F14 | 1 | R027301 | 1.09 | -1.14 | 0.62 | † | † | † |
2 | R026401 | 0.97 | -1.11 | 0.33 | † | † | † | |
3 | R026501 | 0.51 | -0.04 | † | † | † | † | |
4 | R027101 | 1.44 | -0.83 | 0.31 | † | † | † | |
5 | R026601 | 1.66 | -1.03 | 0.46 | † | † | † | |
6 | R028201 | 1.06 | 0.16 | 0.25 | † | † | † | |
7 | R026801 | 0.41 | -0.01 | † | -0.14 | 1.41 | -1.28 | |
8 | R027201 | 0.54 | -0.66 | † | 0.93 | -0.93 | † | |
9 | R026901 | 1.69 | -0.23 | 0.31 | † | † | † | |
10 | R027001 | 0.67 | -1.29 | † | † | † | † | |
R3 | 1 | R060101 | 0.63 | -0.39 | 0.40 | † | † | † |
2 | R060102 | 0.82 | -0.17 | 0.29 | † | † | † | |
3 | R060103 | 0.62 | -0.61 | † | † | † | † | |
4 | R060104 | 1.02 | -0.49 | 0.35 | † | † | † | |
5 | R060105 | 0.90 | -0.13 | † | † | † | † | |
6 | R060106 | 1.06 | -0.35 | 0.19 | † | † | † | |
7 | R060107 | 1.10 | 0.64 | 0.20 | † | † | † | |
8 | R060108 | 0.55 | 0.31 | † | 0.36 | 0.54 | -0.89 | |
9 | R060109 | 1.08 | 0.74 | 0.21 | † | † | † | |
10 | R060110 | 0.66 | 0.83 | 0.22 | † | † | † | |
R4 | 1 | R060301 | 0.67 | -1.24 | † | † | † | † |
2 | R060302 | 0.87 | -0.50 | 0.24 | † | † | † | |
3 | R060304 | 1.06 | 0.12 | 0.59 | † | † | † | |
4 | R060305 | 0.75 | 1.30 | † | 1.77 | -1.77 | † | |
5 | R060303 | 1.47 | 0.46 | 0.20 | † | † | † | |
6 | R060306 | 0.70 | 0.93 | † | 1.38 | -1.38 | † | |
7 | R060307 | 0.82 | 0.10 | 0.20 | † | † | † | |
8 | R060308 | 0.85 | 0.68 | 0.24 | † | † | † | |
9 | R060309 | 0.36 | -0.06 | † | † | † | † | |
10 | R060310 | 1.32 | 0.27 | 0.28 | † | † | † | |
R7 | 1 | R058801 | 1.87 | -0.95 | 0.36 | † | † | † |
2 | R058802 | 1.21 | -1.61 | 0.23 | † | † | † | |
3 | R058803 | 1.79 | -1.09 | 0.27 | † | † | † | |
4 | R058804 | 0.86 | -0.99 | 0.25 | † | † | † | |
5 | R058805 | 0.25 | 0.42 | † | † | † | † | |
6 | R058806 | 0.56 | -0.19 | 0.24 | † | † | † | |
7 | R058807 | 0.41 | -1.39 | † | 0.43 | 0.77 | -1.20 | |
8 | R058808 | 0.95 | -0.54 | 0.27 | † | † | † | |
9 | R058809 | 1.07 | -0.74 | 0.24 | † | † | † | |
10 | R058810 | 0.40 | -0.97 | † | 1.40 | -1.40 | † | |
R8 | 1 | R059101 | 0.40 | -0.06 | 0.23 | † | † | † |
2 | R059102 | 0.82 | -1.78 | 0.29 | † | † | † | |
3 | R059103 | 0.85 | -0.53 | 0.21 | † | † | † | |
4 | R059104 | 1.30 | -1.71 | 0.32 | † | † | † | |
5 | R059109 | 0.46 | -0.17 | † | 0.56 | -0.56 | † | |
6 | R059106 | 0.46 | 0.03 | † | 1.88 | -0.56 | -1.32 | |
7 | R059105 | 0.98 | -0.41 | 0.26 | † | † | † | |
8 | R059107 | 0.44 | -1.53 | 0.14 | † | † | † | |
9 | R059108 | 0.39 | -0.36 | † | -0.52 | 0.52 | † | |
10 | R059110 | 0.54 | -0.80 | † | † | † | † | |
R11 | 1 | R060801 | 1.29 | 0.04 | 0.22 | † | † | † |
2 | R060803 | 0.64 | 0.27 | † | 1.06 | -1.06 | † | |
3 | R060804 | 1.00 | -0.37 | 0.38 | † | † | † | |
4 | R060805 | 0.75 | 0.42 | 0.30 | † | † | † | |
5 | R060806 | 1.28 | -0.73 | 0.32 | † | † | † | |
6 | R060807 | 0.67 | -0.71 | † | † | † | † | |
7 | R060808 | 0.47 | 0.63 | † | 0.62 | 0.06 | -0.68 | |
8 | R060802 | 0.41 | 0.72 | 0.31 | † | † | † | |
9 | R060809 | 1.78 | 0.06 | 0.27 | † | † | † | |
10 | R060810 | 0.46 | 0.49 | † | 0.90 | -0.90 | † | |
11 | R060811 | 0.36 | -0.82 | † | 0.51 | -0.51 | † | |
R12 | 1 | R061101 | 0.78 | 0.26 | 0.20 | † | † | † |
2 | R061102 | 1.24 | -0.38 | 0.34 | † | † | † | |
3 | R063601 | 1.44 | -0.83 | 0.25 | † | † | † | |
4 | R061104 | 0.57 | -0.71 | † | 0.18 | -0.18 | † | |
5 | R061105 | 0.99 | 0.29 | 0.23 | † | † | † | |
6 | R061106 | 0.44 | 0.07 | † | 1.04 | -0.58 | -0.46 | |
7 | R061107 | 1.33 | -0.25 | 0.26 | † | † | † | |
8 | R061108 | 1.00 | -0.07 | 0.21 | † | † | † | |
9 | R061109 | 1.63 | -0.12 | 0.23 | † | † | † | |
10 | R061110 | 0.82 | 1.06 | † | † | † | † | |
11 | R061111 | 0.28 | -1.70 | † | -0.90 | 0.90 | † | |
R13 | 1 | R061301 | 0.64 | -1.24 | † | 1.02 | -1.02 | † |
2 | R061302 | 0.72 | -1.55 | 0.28 | † | † | † | |
3 | R061303 | 0.64 | 0.18 | † | 1.49 | -1.49 | † | |
4 | R061304 | 0.53 | 0.41 | † | † | † | † | |
5 | R061305 | 0.84 | -1.47 | 0.24 | † | † | † | |
6 | R061306 | 1.03 | -0.52 | 0.20 | † | † | † | |
7 | R061307 | 0.49 | -0.36 | † | 1.01 | -0.20 | -0.81 | |
8 | R061308 | 0.62 | 0.09 | 0.32 | † | † | † | |
9 | R061309 | 0.35 | -0.82 | † | -0.02 | 0.02 | † | |
F10 | 1 | R013401 | 1.09 | 0.19 | 0.19 | † | † | † |
2 | R013402 | 0.86 | -0.22 | † | † | † | † | |
3 | R013403 | 0.45 | 0.54 | † | -2.12 | 2.12 | † | |
4 | R013404 | 0.93 | -0.48 | 0.32 | † | † | † | |
5 | R013405 | 0.98 | -0.21 | † | † | † | † | |
6 | R013406 | 0.62 | 0.55 | † | † | † | † | |
7 | R013407 | 0.71 | 0.00 | † | † | † | † | |
8 | R013408 | 0.63 | -0.20 | 0.21 | † | † | † | |
9 | R013409 | 0.78 | -0.24 | † | † | † | † | |
10 | R013410 | 1.06 | -0.18 | 0.33 | † | † | † | |
11 | R013411 | 0.49 | -1.03 | † | † | † | † | |
12 | R013413 | 0.52 | 0.00 | † | † | † | † | |
F11 | 1 | R013001 | 0.70 | -1.16 | † | † | † | † |
2 | R013002 | 1.61 | -0.66 | 0.20 | † | † | † | |
3 | R013003 | 0.95 | -0.57 | † | † | † | † | |
4 | R013004 | 0.33 | 0.94 | † | -0.20 | 0.20 | † | |
5 | R013005 | 0.65 | -1.10 | † | † | † | † | |
6 | R013006 | 1.23 | -0.21 | 0.27 | † | † | † | |
7 | R013007 | 0.55 | -1.78 | † | † | † | † | |
8 | R013008 | 0.62 | 0.40 | † | † | † | † | |
9 | R013009 | 0.79 | -1.06 | † | † | † | † | |
10 | R013010 | 0.84 | -1.00 | † | † | † | † | |
11 | R013011 | 0.48 | -0.46 | † | † | † | † | |
12 | R013012 | 1.00 | -0.28 | 0.25 | † | † | † | |
F15 | 1 | R028301 | 0.71 | -2.02 | 0.26 | † | † | † |
2 | R028401 | 0.36 | -1.36 | † | -0.01 | 0.01 | † | |
3 | R028501 | 0.51 | -1.37 | † | 0.72 | -0.72 | † | |
4 | R029501 | 1.41 | -0.36 | 0.26 | † | † | † | |
5 | R029701 | 1.05 | -1.82 | 0.37 | † | † | † | |
6 | R028801 | 0.29 | -1.69 | † | 1.94 | -1.39 | -0.54 | |
7 | R029001 | 0.88 | -0.97 | 0.41 | † | † | † | |
8 | R029901 | 0.86 | -0.19 | 0.24 | † | † | † | |
9 | R029601 | 0.34 | -1.84 | † | 1.40 | -1.40 | † | |
10 | R029801 | 0.90 | -1.92 | 0.33 | † | † | † |