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Block | Item | NAEP ID | aj | bj | cj | dj1 | dj2 | dj3 | dj4 | dj5 |
---|---|---|---|---|---|---|---|---|---|---|
† 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 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 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. In 2014, grades 4 and 12 were not assessed. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2014 Geography Assessment. | ||||||||||
G3 | 10 | G013801 | 1.67 | 1.19 | .19 | † | † | † | † | † |
12 | G014001 | 1.08 | 1.28 | † | 0.01 | -0.01 | † | † | † | |
15 | G014301 | 0.64 | 0.99 | † | 0.22 | -0.22 | † | † | † | |
G4 | 1 | G032901 | 0.40 | 0.49 | † | 1.84 | -1.84 | † | † | † |
3 | G033101 | 0.71 | 0.87 | .26 | † | † | † | † | † | |
5 | G033301 | 0.47 | -0.17 | † | -1.21 | 1.21 | † | † | † | |
6 | G033401 | 1.10 | 0.49 | .28 | † | † | † | † | † | |
8 | G059701 | 2.06 | 1.28 | .30 | † | † | † | † | † | |
10 | G033801 | 0.43 | -1.07 | † | -0.83 | 0.83 | † | † | † | |
12 | G034001 | 2.34 | 1.33 | .26 | † | † | † | † | † | |
13 | G034101 | 0.55 | 0.65 | † | 1.68 | -1.68 | † | † | † | |
G5 | 10 | G050801 | 0.87 | 0.44 | † | 0.07 | -0.07 | † | † | † |
14 | G050301 | 0.64 | 0.98 | † | 1.64 | -0.05 | -1.59 | † | † | |
G6 | 3 | G034701 | 1.06 | 0.61 | .25 | † | † | † | † | † |
6 | G035001 | 0.68 | 0.77 | † | 1.50 | -0.55 | -0.95 | † | † | |
9 | G035301 | 0.77 | 0.36 | † | 0.87 | -0.41 | -0.46 | † | † | |
13 | G035701 | 0.92 | 1.58 | .25 | † | † | † | † | † | |
14 | G035801 | 0.93 | 1.58 | .26 | † | † | † | † | † | |
15 | G035901 | 0.84 | 1.41 | .32 | † | † | † | † | † | |
G7 | 9 | G052401 | 0.82 | 0.34 | .27 | † | † | † | † | † |
G8 | 5 | G049401 | 0.51 | 0.64 | † | 0.29 | -0.29 | † | † | † |
10 | G046301 | 0.32 | 0.58 | † | 0.23 | 2.03 | -2.25 | † | † | |
G9 | 4 | G019003 | 0.56 | -0.77 | † | 1.41 | -1.41 | † | † | † |
5 | G019101 | 1.84 | 0.31 | .34 | † | † | † | † | † | |
6 | G019102 | 0.95 | 1.34 | † | 0.21 | -0.21 | † | † | † | |
7 | G019201 | 0.81 | 0.21 | .31 | † | † | † | † | † | |
8 | G019202 | 0.77 | 0.16 | † | † | † | † | † | † | |
20 | G019901 | 0.24 | 0.34 | † | 3.97 | 1.06 | -5.04 | † | † | |
21 | G020001 | 0.74 | 2.51 | † | 0.54 | -0.54 | † | † | † | |
23 | G020201 | 0.56 | 1.28 | † | 1.52 | -1.52 | † | † | † | |
25 | G0203CL | 0.57 | 0.75 | † | 0.27 | 0.09 | -0.37 | † | † |