Block | Item | NAEP ID | aj | bj | cj | dj1 | dj2 | dj3 | dj4 | dj5 |
---|---|---|---|---|---|---|---|---|---|---|
† 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), 2010 U.S. History Assessment. |
||||||||||
H3 | 1 | H073501 | 0.49 | -0.07 | † | 0.49 | -0.49 | † | † | † |
4 | H073801 | 0.51 | 0.28 | 0.16 | † | † | † | † | † | |
8 | H074201 | 0.86 | 0.11 | 0.20 | † | † | † | † | † | |
13 | H074701 | 2.64 | 1.04 | 0.34 | † | † | † | † | † | |
14 | H074801 | 0.64 | 1.23 | † | -0.76 | 0.76 | † | † | † | |
15 | H074901 | 0.99 | 0.69 | 0.16 | † | † | † | † | † | |
H4 | 2 | H045601 | 1.79 | 0.50 | 0.50 | † | † | † | † | † |
4 | H045801 | 1.51 | 0.00 | 0.22 | † | † | † | † | † | |
8 | H046201 | 1.10 | 0.49 | 0.30 | † | † | † | † | † | |
H5 | 1 | H062001 | 0.58 | -1.44 | † | 1.00 | -1.00 | † | † | † |
3 | H062201Z | 0.57 | 0.42 | † | -0.97 | 0.97 | † | † | † | |
8 | H062701 | 1.28 | 0.22 | 0.20 | † | † | † | † | † | |
12 | H063101 | 0.61 | 0.57 | † | 0.62 | -0.62 | † | † | † | |
13 | H063201 | 1.14 | 0.16 | 0.24 | † | † | † | † | † | |
16 | H063501 | 0.53 | -0.97 | 0.29 | † | † | † | † | † | |
17 | H063601 | 0.56 | 0.59 | † | 0.76 | -0.76 | † | † | † | |
18 | H063701 | 0.71 | 1.38 | 0.20 | † | † | † | † | † | |
H6 | 17 | H049901 | 0.78 | 0.42 | 0.26 | † | † | † | † | † |
H7 | 3 | H075501 | 0.42 | -0.24 | 0.24 | † | † | † | † | † |
7 | H075901 | 0.85 | 0.71 | 0.29 | † | † | † | † | † | |
11 | H076301 | 1.59 | 2.21 | 0.26 | † | † | † | † | † | |
12 | H076401 | 0.72 | 0.29 | † | 0.31 | -0.31 | † | † | † | |
13 | H076501 | 0.74 | 1.42 | † | 0.95 | -0.95 | † | † | † | |
16 | H076801 | 0.51 | -0.62 | † | 0.50 | -0.50 | † | † | † | |
H8 | 4 | H091501 | 0.71 | 0.95 | † | 0.05 | -0.05 | † | † | † |
8 | H096501 | 0.83 | -0.05 | 0.27 | † | † | † | † | † | |
9 | H096601 | 1.13 | 0.09 | 0.25 | † | † | † | † | † | |
13 | H094801 | 0.44 | 0.34 | † | 0.53 | -0.53 | † | † | † | |
16 | H095301 | 0.81 | 0.49 | 0.33 | † | † | † | † | † | |
H9 | 2 | H093101 | 0.53 | 0.41 | † | 0.68 | -0.68 | † | † | † |
12 | H093801 | 2.37 | 0.37 | 0.32 | † | † | † | † | † | |
13 | H093803 | 0.65 | 0.35 | † | 0.27 | -0.27 | † | † | † | |
17 | H092501 | 1.07 | -0.27 | 0.17 | † | † | † | † | † | |
H10 | 3 | H042101 | 0.60 | -0.78 | 0.36 | † | † | † | † | † |
4 | H042102 | 0.92 | 0.33 | 0.28 | † | † | † | † | † | |
11 | H042701 | 0.57 | -0.70 | 0.22 | † | † | † | † | † | |
12 | H042702 | 0.75 | -1.17 | 0.22 | † | † | † | † | † | |
16 | H043001 | 0.62 | 0.19 | † | 0.49 | -0.49 | † | † | † | |
17 | H043101 | 0.29 | 0.41 | † | 1.52 | -1.52 | † | † | † | |
H11 | 6 | H0642CL | 0.50 | 0.06 | † | 0.46 | -0.46 | † | † | † |
7 | H064401 | 0.43 | 0.97 | † | 0.18 | 0.19 | -0.37 | † | † | |
8 | H064501 | 1.09 | -0.67 | 0.34 | † | † | † | † | † |