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: Single overall scale. 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 Geography Assessment. |
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G3 | 2 | G020601 | 0.74 | 0.09 | 0.23 | † | † | † | † | † |
3 | G020602 | 0.36 | 2.67 | 0.22 | † | † | † | † | † | |
5 | G020801 | 0.78 | -0.45 | 0.20 | † | † | † | † | † | |
9 | G021101 | 0.36 | -1.34 | 0.23 | † | † | † | † | † | |
12 | G021401 | 0.70 | -0.23 | † | -0.21 | 0.40 | -0.19 | † | † | |
14 | G021601 | 0.75 | 1.91 | † | -0.29 | 0.57 | -0.29 | † | † | |
G4 | 5 | G038301 | 0.81 | 0.27 | 0.18 | † | † | † | † | † |
6 | G038401 | 0.53 | 0.95 | † | 0.75 | -0.75 | † | † | † | |
9 | G038701 | 0.82 | -0.01 | 0.23 | † | † | † | † | † | |
12 | G039001 | 0.59 | -0.34 | 0.26 | † | † | † | † | † | |
16 | G039401 | 0.89 | 0.33 | 0.18 | † | † | † | † | † | |
G5 | 1 | G056301 | 0.69 | 0.06 | 0.24 | † | † | † | † | † |
3 | G048901 | 1.17 | 0.48 | 0.33 | † | † | † | † | † | |
4 | G056201 | 0.97 | 0.58 | 0.20 | † | † | † | † | † | |
8 | G059601 | 0.81 | 0.84 | 0.24 | † | † | † | † | † | |
16 | G055701 | 1.08 | 1.14 | 0.27 | † | † | † | † | † | |
17 | G054501 | 1.68 | 1.50 | 0.15 | † | † | † | † | † | |
G6 | 1 | G034501 | 0.49 | -1.06 | 0.24 | † | † | † | † | † |
11 | G035501 | 0.58 | 1.15 | † | 0.17 | 0.12 | -0.28 | † | † | |
G7 | 1 | G058701 | 0.51 | 0.29 | 0.19 | † | † | † | † | † |
2 | G057001 | 0.96 | -0.30 | 0.26 | † | † | † | † | † | |
3 | G059001 | 0.39 | 0.92 | † | -3.59 | 3.59 | † | † | † | |
4 | G057501 | 0.67 | -1.26 | 0.26 | † | † | † | † | † | |
7 | G058801 | 0.45 | 3.14 | † | 2.28 | -2.28 | † | † | † | |
8 | G058901 | 1.48 | 0.06 | 0.22 | † | † | † | † | † | |
9 | G059101 | 1.20 | -0.49 | 0.24 | † | † | † | † | † | |
10 | G057601 | 0.49 | 1.50 | † | 0.93 | -0.93 | † | † | † | |
11 | G057301 | 0.85 | 1.68 | 0.26 | † | † | † | † | † | |
13 | G056501 | 0.64 | 2.02 | † | 0.33 | -0.33 | † | † | † | |
14 | G056901 | 0.84 | 0.32 | 0.26 | † | † | † | † | † | |
15 | G056401 | 0.80 | 0.27 | 0.26 | † | † | † | † | † | |
G8 | 1 | G024701 | 1.77 | 1.08 | 0.26 | † | † | † | † | † |
3 | G024901 | 2.10 | 1.84 | 0.13 | † | † | † | † | † | |
4 | G024902 | 1.04 | 1.41 | 0.34 | † | † | † | † | † | |
5 | G024903 | 0.75 | -0.14 | 0.34 | † | † | † | † | † | |
11 | G025401 | 1.43 | 0.56 | 0.18 | † | † | † | † | † | |
G9 | 1 | G025901 | 1.06 | 1.07 | 0.23 | † | † | † | † | † |
2 | G026001 | 1.17 | 0.85 | 0.22 | † | † | † | † | † | |
3 | G026002 | 0.56 | 0.83 | 0.24 | † | † | † | † | † | |
5 | G026201 | 1.39 | 0.10 | 0.36 | † | † | † | † | † | |
6 | G026202 | 0.69 | 0.23 | 0.21 | † | † | † | † | † | |
7 | G026203 | 0.99 | -0.57 | 0.23 | † | † | † | † | † | |
8 | G026204 | 0.92 | 0.12 | † | † | † | † | † | † | |
12 | G026501 | 1.64 | -0.96 | 0.32 | † | † | † | † | † | |
13 | G026502 | 0.86 | -0.12 | † | † | † | † | † | † | |
15 | G026601 | 0.89 | 1.59 | † | 0.21 | -0.21 | † | † | † | |
16 | G026701 | 0.76 | -0.39 | 0.43 | † | † | † | † | † | |
17 | G026702 | 1.11 | 0.53 | 0.24 | † | † | † | † | † | |
18 | G026801 | 1.10 | -1.10 | 0.25 | † | † | † | † | † | |
19 | G026802 | 1.05 | 1.09 | 0.17 | † | † | † | † | † | |
20 | G026803 | 0.38 | 0.98 | 0.27 | † | † | † | † | † | |
21 | G026901 | 0.79 | 1.29 | † | † | † | † | † | † | |
22 | G027001 | 0.53 | -1.85 | 0.22 | † | † | † | † | † |