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 | 1 | G013301 | 0.71 | -1.72 | 0.24 | † | † | † | † | † |
2 | G013302 | 0.46 | -1.19 | 0.28 | † | † | † | † | † | |
3 | G013401 | 0.75 | -1.25 | 0.20 | † | † | † | † | † | |
7 | G013601 | 0.78 | -1.52 | 0.20 | † | † | † | † | † | |
8 | G013602 | 0.58 | -0.49 | 0.18 | † | † | † | † | † | |
9 | G013701 | 0.82 | -0.28 | 0.22 | † | † | † | † | † | |
13 | G014101 | 1.44 | 1.26 | 0.16 | † | † | † | † | † | |
16 | G014401 | 0.70 | 1.59 | † | 1.72 | -1.72 | † | † | † | |
17 | G014501 | 1.31 | 1.99 | 0.25 | † | † | † | † | † | |
G4 | 4 | G033201 | 1.15 | 0.71 | 0.32 | † | † | † | † | † |
11 | G033901 | 1.31 | 0.99 | 0.25 | † | † | † | † | † | |
15 | G034301 | 0.89 | 0.92 | 0.27 | † | † | † | † | † | |
16 | G034401 | 0.99 | 0.53 | 0.43 | † | † | † | † | † | |
G5 | 2 | G050001 | 0.39 | 0.98 | † | 0.51 | -0.51 | † | † | † |
3 | G046701 | 0.69 | -0.15 | † | 0.95 | -0.95 | † | † | † | |
5 | G051301 | 0.79 | 1.46 | 0.21 | † | † | † | † | † | |
6 | G048701 | 0.88 | 0.43 | 0.23 | † | † | † | † | † | |
12 | G048601 | 0.67 | 1.28 | 0.21 | † | † | † | † | † | |
15 | G047001 | 1.48 | 0.83 | 0.28 | † | † | † | † | † | |
17 | G049801 | 0.98 | -0.81 | 0.22 | † | † | † | † | † | |
G6 | 1 | G034501 | 0.62 | -0.53 | 0.21 | † | † | † | † | † |
11 | G035501 | 0.52 | 1.78 | † | 0.14 | 0.10 | -0.25 | † | † | |
G7 | 1 | G051801 | 1.02 | -0.38 | 0.21 | † | † | † | † | † |
2 | G051601 | 0.30 | -1.16 | † | -3.02 | 0.06 | 2.96 | † | † | |
3 | G051501 | 0.70 | -0.50 | 0.18 | † | † | † | † | † | |
4 | G052101 | 0.68 | 0.70 | 0.22 | † | † | † | † | † | |
5 | G052901 | 0.62 | -0.57 | † | 0.42 | -0.42 | † | † | † | |
6 | G052601 | 0.86 | -0.54 | 0.24 | † | † | † | † | † | |
7 | G053201 | 1.06 | 0.33 | 0.10 | † | † | † | † | † | |
8 | G052501 | 0.86 | 1.39 | † | -0.53 | 0.53 | † | † | † | |
12 | G052701 | 1.13 | 1.22 | 0.23 | † | † | † | † | † | |
15 | G053801 | 1.04 | 0.45 | 0.26 | † | † | † | † | † | |
G8 | 1 | G046101 | 0.76 | 1.23 | 0.24 | † | † | † | † | † |
2 | G046201 | 0.29 | -1.26 | 0.25 | † | † | † | † | † | |
3 | G049001 | 0.35 | -1.98 | † | -0.06 | 0.06 | † | † | † | |
8 | G049201 | 0.79 | 0.32 | 0.30 | † | † | † | † | † | |
9 | G048901 | 0.65 | 0.39 | 0.20 | † | † | † | † | † | |
13 | G050101 | 1.14 | -0.05 | 0.20 | † | † | † | † | † | |
14 | G050102 | 0.77 | 3.47 | 0.16 | † | † | † | † | † | |
17 | G048201 | 1.15 | 0.87 | 0.23 | † | † | † | † | † | |
G9 | 1 | G018901 | 0.90 | -0.53 | 0.11 | † | † | † | † | † |
2 | G019001 | 0.68 | -2.65 | 0.24 | † | † | † | † | † | |
3 | G019002 | 0.27 | 0.28 | † | -7.10 | 7.10 | † | † | † | |
9 | G019301 | 0.94 | 0.01 | 0.13 | † | † | † | † | † | |
10 | G019302 | 0.43 | 1.10 | † | † | † | † | † | † | |
11 | G019401 | 1.64 | 0.73 | 0.09 | † | † | † | † | † | |
12 | G019402 | 0.62 | 0.22 | † | 0.12 | -0.12 | † | † | † | |
13 | G019403 | 0.33 | 0.78 | 0.24 | † | † | † | † | † | |
14 | G019501 | 0.39 | -0.77 | 0.21 | † | † | † | † | † | |
15 | G019601 | 0.68 | -0.10 | 0.21 | † | † | † | † | † | |
16 | G019701 | 0.57 | 1.21 | 0.26 | † | † | † | † | † | |
17 | G019702 | 0.85 | 0.32 | 0.40 | † | † | † | † | † | |
18 | G019703 | 0.76 | 0.67 | 0.30 | † | † | † | † | † | |
19 | G019801 | 0.67 | -0.42 | 0.20 | † | † | † | † | † | |
22 | G020101 | 0.94 | 0.48 | 0.24 | † | † | † | † | † | |
26 | G020401 | 0.34 | -0.96 | 0.24 | † | † | † | † | † |