Table of Contents | Search Technical Documentation | References
Block | Item | NAEP ID | aj | bj | cj | dj1 | dj2 | dj3 | dj4 |
---|---|---|---|---|---|---|---|---|---|
† Not applicable; c parameters are not estimated for the two-parameter logistic model or 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 assumed to be exactly zero and is not estimated 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), 2013 Reading Assessment. | |||||||||
R3 | 1 | R060101 | 0.66 | -0.99 | .34 | † | † | † | † |
2 | R060102 | 1.14 | -0.52 | .36 | † | † | † | † | |
3 | R060103 | 0.64 | -1.27 | † | † | † | † | † | |
4 | R060104 | 0.88 | -1.42 | .32 | † | † | † | † | |
5 | R060105 | 0.81 | -0.89 | † | † | † | † | † | |
6 | R060106 | 1.11 | -0.88 | .23 | † | † | † | † | |
7 | R060107 | 1.09 | 0.02 | .24 | † | † | † | † | |
8 | R060108 | 0.56 | -0.34 | † | 0.13 | 0.66 | -0.80 | † | |
9 | R060109 | 0.71 | -0.38 | .14 | † | † | † | † | |
10 | R060110 | 0.55 | 0.28 | .25 | † | † | † | † | |
R4 | 1 | R060301 | 0.56 | -1.71 | † | † | † | † | † |
2 | R060302 | 0.97 | -1.13 | .26 | † | † | † | † | |
3 | R060304 | 0.99 | -0.98 | .35 | † | † | † | † | |
4 | R060305 | 0.71 | 0.48 | † | 2.13 | -2.13 | † | † | |
5 | R060303 | 1.23 | -0.17 | .19 | † | † | † | † | |
6 | R060306 | 0.66 | 0.45 | † | 1.35 | -1.35 | † | † | |
7 | R060307 | 0.73 | -0.47 | .24 | † | † | † | † | |
8 | R060308 | 0.84 | -0.03 | .23 | † | † | † | † | |
9 | R060309 | 0.55 | -0.89 | † | † | † | † | † | |
10 | R060310 | 1.26 | -0.36 | .24 | † | † | † | † | |
R7 | 1 | R062201 | 0.77 | -2.07 | .24 | † | † | † | † |
2 | R062202 | 0.93 | -0.53 | .38 | † | † | † | † | |
3 | R062203 | 0.90 | -0.57 | † | † | † | † | † | |
4 | R062204 | 0.68 | -0.89 | .40 | † | † | † | † | |
5 | R062205 | 0.80 | 0.13 | † | † | † | † | † | |
6 | R062206 | 0.77 | -0.34 | .13 | † | † | † | † | |
7 | R062207 | 0.66 | 0.09 | † | 1.37 | -1.13 | -0.24 | † | |
8 | R062208 | 0.40 | -0.79 | .19 | † | † | † | † | |
9 | R062209 | 1.16 | 0.12 | .29 | † | † | † | † | |
10 | R062210 | 0.81 | 0.87 | † | 1.41 | -1.41 | † | † | |
11 | R062211 | 1.09 | -0.77 | .27 | † | † | † | † | |
R8 | 1 | R062301 | 1.12 | -0.87 | .23 | † | † | † | † |
2 | R062302 | 1.44 | -1.06 | .40 | † | † | † | † | |
3 | R062303 | 0.72 | 1.02 | † | 1.28 | -1.28 | † | † | |
4 | R062304 | 1.03 | 0.39 | † | 0.91 | -0.91 | † | † | |
5 | R062305 | 1.26 | -0.63 | .24 | † | † | † | † | |
6 | R062307 | 0.95 | -0.31 | .41 | † | † | † | † | |
7 | R062308 | 0.48 | 0.49 | † | -0.61 | 1.83 | -1.22 | † | |
8 | R062309 | 1.31 | -0.64 | .31 | † | † | † | † | |
9 | R062310 | 1.45 | 0.05 | .32 | † | † | † | † | |
10 | R062311 | 0.64 | -0.49 | † | 0.03 | -0.03 | † | † | |
R9 | 1 | R062501 | 0.87 | -1.09 | † | 0.44 | -0.44 | † | † |
2 | R062502 | 1.12 | -0.05 | .33 | † | † | † | † | |
3 | R062511 | 1.29 | -0.15 | .32 | † | † | † | † | |
4 | R062505 | 0.62 | 0.29 | † | 1.12 | -1.12 | † | † | |
5 | R062507 | 1.09 | 0.01 | .32 | † | † | † | † | |
6 | R062508 | 0.55 | 0.20 | † | 1.06 | 0.12 | -1.18 | † | |
7 | R062509 | 1.08 | 0.91 | .26 | † | † | † | † | |
8 | R062503 | 0.62 | 0.24 | † | 0.41 | -0.41 | † | † | |
9 | R062510 | 0.73 | -0.09 | .27 | † | † | † | † | |
R10 | 1 | R062701 | 1.11 | -0.68 | .17 | † | † | † | † |
2 | R062702 | 0.78 | -0.09 | .21 | † | † | † | † | |
3 | R062703 | 0.41 | -1.14 | .23 | † | † | † | † | |
4 | R062704 | 1.07 | 0.32 | .31 | † | † | † | † | |
5 | R062705 | 0.77 | 0.24 | † | 0.90 | -0.90 | † | † | |
6 | R062706 | 0.67 | 0.28 | † | 0.82 | -0.21 | -0.62 | † | |
7 | R062707 | 1.47 | -0.29 | .30 | † | † | † | † | |
8 | R062708 | 0.78 | -0.86 | † | † | † | † | † | |
9 | R062709 | 1.06 | 0.82 | .44 | † | † | † | † | |
10 | R062710 | 0.80 | 0.54 | † | 0.47 | -0.47 | † | † | |
R11 | 1 | R062901 | 1.38 | -0.55 | .30 | † | † | † | † |
2 | R062902 | 0.51 | -0.29 | † | 0.99 | -0.99 | † | † | |
3 | R062903 | 0.55 | 0.51 | † | 0.97 | -0.97 | † | † | |
4 | R062904 | 0.50 | -0.52 | .26 | † | † | † | † | |
5 | R062905 | 0.79 | 0.08 | .23 | † | † | † | † | |
6 | R062908 | 0.64 | 0.58 | † | 0.87 | -0.83 | -0.04 | † | |
7 | R062906 | 1.17 | 0.97 | .13 | † | † | † | † | |
8 | R062907 | 0.45 | -0.35 | .20 | † | † | † | † | |
9 | R062909 | 0.59 | 0.60 | † | 0.39 | -0.39 | † | † | |
10 | R062910 | 1.11 | -1.13 | .30 | † | † | † | † | |
R12 | 1 | R063102 | 1.43 | -1.12 | .52 | † | † | † | † |
2 | R063103 | 1.43 | 0.14 | .32 | † | † | † | † | |
3 | R063101 | 0.79 | -0.19 | † | 0.53 | -0.53 | † | † | |
4 | R063104 | 0.89 | -0.88 | .23 | † | † | † | † | |
5 | R063105 | 0.66 | 0.55 | † | 1.12 | -0.75 | -0.36 | † | |
6 | R063106 | 0.91 | -0.94 | .21 | † | † | † | † | |
7 | R063801 | 0.48 | -0.40 | † | 0.09 | -0.09 | † | † | |
8 | R063802 | 1.33 | -0.22 | .31 | † | † | † | † | |
9 | R063108 | 1.27 | -0.67 | .31 | † | † | † | † | |
10 | R063109 | 0.69 | -0.28 | † | -1.84 | 1.84 | † | † | |
11 | R063110 | 0.86 | 0.34 | .25 | † | † | † | † | |
R13 | 1 | R079101 | 0.63 | -0.55 | † | 0.14 | -0.14 | † | † |
2 | R079102 | 1.03 | -0.64 | .14 | † | † | † | † | |
3 | R079103 | 0.97 | -1.01 | .29 | † | † | † | † | |
4 | R079104 | 1.55 | 1.14 | .23 | † | † | † | † | |
5 | R079105 | 1.35 | -0.08 | .27 | † | † | † | † | |
6 | R079106 | 0.32 | 1.06 | † | 0.11 | 0.26 | -0.36 | † | |
7 | R079107 | 0.54 | 0.53 | † | † | † | † | † | |
8 | R079108 | 1.20 | 0.42 | .29 | † | † | † | † | |
9 | R079109 | 0.97 | -1.17 | .32 | † | † | † | † | |
10 | R079110 | 0.50 | 1.15 | † | 0.01 | -0.01 | † | † | |
11 | R079111 | 0.50 | 0.42 | † | 0.50 | -0.50 | † | † |