Table of Contents | Search Technical Documentation | References
Block | Item | NAEP ID | aj | bj | cj | dj1 | dj2 | dj3 |
---|---|---|---|---|---|---|---|---|
† 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), 2006 Civics Assessment. |
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P3 | 1 | P041501 | 0.88 | 0.65 | 0.19 | † | † | † |
2 | P041502 | 0.68 | 1.00 | 0.28 | † | † | † | |
3 | P041503 | 0.85 | 0.79 | † | 0.21 | -0.21 | † | |
4 | P041504 | 1.80 | 0.56 | 0.22 | † | † | † | |
5 | P041505 | 0.59 | 0.15 | † | 0.63 | -0.63 | † | |
6 | P041506 | 1.21 | 0.30 | 0.28 | † | † | † | |
7 | P041507 | 1.07 | -0.57 | 0.22 | † | † | † | |
8 | P041508 | 1.07 | 0.58 | 0.33 | † | † | † | |
9 | P041509 | 0.65 | 0.79 | † | 0.79 | -0.40 | -0.39 | |
10 | P041510 | 1.32 | 0.82 | 0.20 | † | † | † | |
11 | P041511 | 0.78 | 0.10 | † | -0.05 | 0.05 | † | |
12 | P041512 | 1.26 | -0.48 | 0.24 | † | † | † | |
13 | P041513 | 1.04 | 0.28 | 0.31 | † | † | † | |
14 | P041514 | 1.14 | 0.88 | 0.15 | † | † | † | |
15 | P041515 | 2.17 | 0.59 | 0.24 | † | † | † | |
16 | P041516 | 1.20 | 0.59 | 0.31 | † | † | † | |
17 | P041517 | 1.29 | 0.10 | 0.39 | † | † | † | |
18 | P041518 | 1.71 | 0.59 | 0.15 | † | † | † | |
19 | P041519 | 1.87 | -0.02 | 0.29 | † | † | † | |
P4 | 1 | P041601 | 0.91 | -0.96 | 0.29 | † | † | † |
2 | P041602 | 0.86 | -0.68 | 0.20 | † | † | † | |
3 | P041603 | 1.80 | 0.56 | 0.20 | † | † | † | |
4 | P041604 | 1.35 | 0.35 | 0.33 | † | † | † | |
5 | P041605 | 1.28 | 0.02 | 0.31 | † | † | † | |
6 | P041606 | 0.70 | 0.88 | † | † | † | † | |
7 | P041607 | 0.60 | 0.98 | 0.29 | † | † | † | |
8 | P041608 | 1.97 | 0.98 | 0.24 | † | † | † | |
9 | P041609 | 0.73 | 0.21 | 0.28 | † | † | † | |
10 | P041610 | 1.45 | 0.96 | 0.15 | † | † | † | |
11 | P041611 | 0.73 | -0.29 | 0.30 | † | † | † | |
12 | P041612 | 1.27 | 1.04 | 0.29 | † | † | † | |
13 | P041613 | 0.39 | 0.18 | † | 1.17 | -1.17 | † | |
14 | P041614 | 0.43 | -0.87 | † | 0.27 | -0.27 | † | |
15 | P041615 | 0.79 | 0.49 | 0.30 | † | † | † | |
16 | P041616 | 1.49 | 1.85 | 0.19 | † | † | † | |
17 | P041617 | 1.11 | -0.02 | 0.28 | † | † | † | |
18 | P041618 | 1.39 | 0.34 | 0.27 | † | † | † | |
19 | P041619 | 0.72 | 0.33 | 0.20 | † | † | † | |
P5 | 1 | P041701 | 0.88 | -0.34 | 0.20 | † | † | † |
2 | P041702 | 0.91 | 0.35 | 0.22 | † | † | † | |
3 | P041703 | 1.23 | 0.97 | 0.25 | † | † | † | |
4 | P041704 | 2.14 | 1.36 | 0.37 | † | † | † | |
5 | P041705 | 0.70 | -0.05 | † | † | † | † | |
6 | P041706 | 0.64 | 1.07 | † | 0.48 | 0.08 | -0.56 | |
7 | P041707 | 1.47 | 1.00 | 0.27 | † | † | † | |
8 | P041708 | 1.07 | 0.62 | 0.22 | † | † | † | |
9 | P041709 | 1.33 | 0.10 | 0.35 | † | † | † | |
10 | P041710 | 1.09 | -0.43 | 0.31 | † | † | † | |
11 | P041711 | 0.74 | 1.05 | † | 0.19 | -0.19 | † | |
12 | P041712 | 0.45 | -0.15 | 0.18 | † | † | † | |
13 | P041713 | 0.65 | 0.15 | † | -0.32 | 0.32 | † | |
14 | P041714 | 0.72 | 0.66 | 0.32 | † | † | † | |
15 | P041715 | 1.25 | 0.56 | 0.27 | † | † | † | |
16 | P041716 | 0.93 | 0.40 | 0.24 | † | † | † | |
17 | P041717 | 1.39 | 0.11 | 0.20 | † | † | † | |
18 | P041718 | 1.20 | 0.45 | 0.26 | † | † | † | |
19 | P041719 | 1.34 | 0.37 | 0.22 | † | † | † | |
P6 | 1 | P041801 | 0.72 | 0.44 | 0.25 | † | † | † |
2 | P041802 | 0.41 | -2.07 | 0.24 | † | † | † | |
3 | P041803 | 0.82 | -0.08 | 0.26 | † | † | † | |
4 | P041804 | 0.60 | 0.13 | † | 0.66 | -0.66 | † | |
5 | P041805 | 0.65 | -2.05 | 0.29 | † | † | † | |
6 | P041806 | 0.50 | 0.46 | † | 0.29 | -0.29 | † | |
7 | P041807 | 1.01 | -1.01 | 0.23 | † | † | † | |
8 | P041808 | 1.99 | 1.41 | 0.27 | † | † | † | |
9 | P041809 | 0.89 | 0.53 | 0.26 | † | † | † | |
11 | P041811 | 1.23 | 0.60 | 0.32 | † | † | † | |
12 | P041812 | 1.30 | 0.57 | 0.16 | † | † | † | |
13 | P041813 | 1.19 | 0.62 | 0.29 | † | † | † | |
14 | P041814 | 1.00 | 1.41 | 0.24 | † | † | † | |
15 | P041815 | 1.25 | 0.51 | † | † | † | † | |
16 | P041816 | 0.99 | 0.57 | 0.37 | † | † | † | |
17 | P041817 | 0.89 | 0.10 | 0.25 | † | † | † | |
18 | P041818 | 1.58 | 0.17 | 0.46 | † | † | † | |
19 | P041819 | 1.22 | 0.89 | 0.16 | † | † | † | |
P7 | 1 | P041901 | 0.70 | -1.28 | 0.36 | † | † | † |
2 | P041902 | 0.62 | 0.67 | † | -0.77 | 0.77 | † | |
3 | P041903 | 1.38 | 0.90 | 0.38 | † | † | † | |
4 | P041904 | 1.68 | 0.47 | 0.29 | † | † | † | |
5 | P041905 | 0.52 | -0.39 | † | 3.05 | -0.94 | -2.12 | |
6 | P041906 | 1.31 | 1.71 | 0.24 | † | † | † | |
7 | P041907 | 0.91 | 1.14 | † | 0.20 | 0.19 | -0.39 | |
8 | P041908 | 1.21 | 0.36 | 0.26 | † | † | † | |
9 | P041909 | 1.38 | 1.24 | 0.23 | † | † | † | |
10 | P041910 | 0.98 | 0.83 | 0.32 | † | † | † | |
11 | P041911 | 1.00 | 0.91 | 0.28 | † | † | † | |
12 | P041912 | 0.59 | 1.10 | † | 0.57 | -0.57 | † | |
13 | P041913 | 1.66 | 0.87 | 0.22 | † | † | † | |
14 | P041914 | 0.92 | -0.33 | 0.33 | † | † | † | |
15 | P041915 | 1.53 | 0.86 | 0.31 | † | † | † | |
16 | P041916 | 1.08 | 1.00 | 0.21 | † | † | † | |
17 | P041917 | 1.73 | 0.46 | 0.22 | † | † | † | |
18 | P041918 | 0.94 | 0.27 | 0.35 | † | † | † | |
19 | P041919 | 1.36 | -0.10 | 0.32 | † | † | † | |
P8 | 1 | P042189 | 1.09 | 0.60 | 0.37 | † | † | † |
2 | P042190 | 1.30 | 1.36 | 0.14 | † | † | † | |
3 | P042191 | 0.67 | -0.50 | † | 0.15 | -0.15 | † | |
4 | P042192 | 1.06 | 0.87 | 0.29 | † | † | † | |
5 | P042193 | 0.61 | 0.64 | 0.25 | † | † | † | |
6 | P042194 | 0.98 | 0.26 | 0.26 | † | † | † | |
7 | P042195 | 0.93 | 0.93 | † | 0.30 | -0.25 | -0.05 | |
8 | P042196 | 2.03 | 0.06 | 0.31 | † | † | † | |
9 | P042197 | 0.93 | 0.37 | 0.25 | † | † | † | |
10 | P042198 | 1.39 | -0.31 | 0.39 | † | † | † | |
11 | P042199 | 0.78 | 1.25 | † | 0.23 | -0.23 | † | |
12 | P042200 | 1.41 | 0.62 | 0.25 | † | † | † | |
13 | P042201 | 0.71 | 1.26 | 0.22 | † | † | † | |
14 | P042202 | 1.21 | 0.83 | 0.39 | † | † | † | |
15 | P042203 | 0.50 | 0.63 | † | 0.39 | -0.39 | † | |
16 | P042204 | 1.13 | -0.76 | 0.26 | † | † | † | |
17 | P042205 | 2.39 | 1.08 | 0.25 | † | † | † | |
18 | P042206 | 0.93 | -0.15 | 0.22 | † | † | † | |
19 | P042207 | 1.51 | -0.20 | 0.24 | † | † | † | |
P9 | 1 | P042208 | 0.80 | -0.35 | 0.32 | † | † | † |
2 | P042209 | 0.82 | -0.32 | 0.32 | † | † | † | |
3 | P042210 | 0.64 | 0.06 | † | -0.62 | 0.62 | † | |
4 | P042211 | 0.78 | 0.17 | 0.21 | † | † | † | |
5 | P042212 | 0.80 | -0.18 | 0.19 | † | † | † | |
6 | P042213 | 0.28 | 1.19 | 0.32 | † | † | † | |
7 | P042214 | 0.63 | 0.83 | † | 0.30 | 0.14 | -0.45 | |
8 | P042215 | 1.38 | 0.41 | 0.29 | † | † | † | |
9 | P042216 | 1.01 | 0.73 | 0.45 | † | † | † | |
10 | P042217 | 0.97 | 0.08 | 0.27 | † | † | † | |
11 | P042218 | 0.73 | 0.36 | † | -0.23 | 0.23 | † | |
12 | P042219 | 0.70 | -0.35 | 0.26 | † | † | † | |
13 | P042220 | 1.11 | 0.72 | 0.24 | † | † | † | |
14 | P042221 | 1.09 | -0.68 | 0.29 | † | † | † | |
15 | P042222 | 0.78 | 0.56 | † | 0.49 | -0.49 | † | |
16 | P042223 | 1.61 | -0.13 | 0.27 | † | † | † | |
17 | P042224 | 1.43 | 0.10 | 0.27 | † | † | † | |
18 | P042225 | 1.74 | 0.73 | 0.15 | † | † | † | |
19 | P042226 | 0.89 | -0.45 | 0.44 | † | † | † | |
P10 | 1 | P041401 | 0.47 | -0.58 | 0.26 | † | † | † |
2 | P041402 | 0.97 | -0.13 | 0.31 | † | † | † | |
3 | P041403 | 1.10 | 0.38 | 0.32 | † | † | † | |
4 | P041404 | 0.62 | 0.54 | † | 2.09 | -0.53 | -1.56 | |
5 | P041405 | 0.73 | -0.66 | 0.33 | † | † | † | |
6 | P041406 | 1.18 | -0.78 | 0.50 | † | † | † | |
7 | P041407 | 0.95 | 1.52 | 0.31 | † | † | † | |
8 | P041408 | 0.43 | -0.15 | † | 0.13 | -0.13 | † | |
9 | P041409 | 2.69 | 0.57 | 0.25 | † | † | † | |
10 | P041410 | 1.09 | 0.74 | 0.25 | † | † | † | |
11 | P041411 | 1.51 | 0.61 | 0.20 | † | † | † | |
12 | P041412 | 1.07 | 1.32 | † | 0.74 | -0.74 | † | |
13 | P041413 | 0.80 | 1.18 | † | 0.93 | -0.93 | † | |
14 | P041414 | 0.93 | -0.18 | 0.34 | † | † | † | |
15 | P041415 | 0.60 | 0.80 | 0.27 | † | † | † | |
16 | P041416 | 1.32 | -0.64 | 0.36 | † | † | † | |
17 | P041417 | 0.87 | 0.04 | 0.27 | † | † | † | |
18 | P041418 | 0.41 | -1.07 | 0.24 | † | † | † | |
19 | P041419 | 1.97 | 1.05 | 0.19 | † | † | † |