Block | Item | NAEP ID | aj | bj | cj | dj1 | dj2 | dj3 | dj4 |
---|---|---|---|---|---|---|---|---|---|
† 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: Univariate 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), 2009 Science Assessment. |
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S3 | 1 | K080101 | 0.74 | -0.27 | 0.28 | † | † | † | † |
2 | K080001 | 0.53 | 0.74 | 0.17 | † | † | † | † | |
3 | K077602 | 0.50 | 0.33 | † | 0.83 | -0.45 | -0.38 | † | |
4 | K077603 | 1.06 | 1.63 | 0.33 | † | † | † | † | |
5 | K080301 | 0.36 | 0.07 | 0.14 | † | † | † | † | |
6 | K080302 | 0.90 | 0.96 | 0.41 | † | † | † | † | |
7 | K080404 | 0.61 | 1.20 | † | 0.83 | -0.83 | † | † | |
8 | K080501 | 0.98 | -0.02 | 0.28 | † | † | † | † | |
9 | K080502 | 0.45 | 0.92 | 0.21 | † | † | † | † | |
10 | K153001 | 0.62 | 1.37 | † | 0.85 | -0.85 | † | † | |
11 | K080601 | 1.14 | 0.61 | 0.23 | † | † | † | † | |
12 | K153101 | 0.88 | 1.02 | 0.19 | † | † | † | † | |
13 | K153102 | 0.36 | 3.74 | † | † | † | † | † | |
14 | K080801 | 0.71 | -1.07 | 0.43 | † | † | † | † | |
15 | K106701 | 0.52 | 0.92 | † | 0.96 | -0.96 | † | † | |
16 | K081001 | 1.35 | 0.31 | 0.22 | † | † | † | † | |
17 | K081201 | 1.11 | 0.94 | 0.16 | † | † | † | † | |
S4 | 1 | K079001 | 1.38 | -0.10 | 0.35 | † | † | † | † |
2 | K078801 | 0.50 | 0.40 | 0.28 | † | † | † | † | |
3 | K078701 | 1.07 | 0.96 | 0.08 | † | † | † | † | |
4 | K078902 | 0.59 | 1.51 | † | 2.43 | -2.43 | † | † | |
5 | K084301 | 0.62 | 0.44 | † | † | † | † | † | |
6 | K084302 | 0.78 | 0.16 | † | † | † | † | † | |
7 | K153201 | 0.70 | -1.25 | 0.53 | † | † | † | † | |
8 | K153301 | 0.74 | -0.04 | † | 0.91 | -0.91 | † | † | |
9 | K079301 | 0.40 | 0.08 | 0.10 | † | † | † | † | |
10 | K079501 | 0.56 | 1.41 | † | 0.45 | -0.45 | † | † | |
11 | K086401 | 0.60 | -2.65 | 0.15 | † | † | † | † | |
12 | K079801 | 1.17 | 1.16 | 0.12 | † | † | † | † | |
14 | K084401 | 0.86 | -0.21 | 0.18 | † | † | † | † | |
15 | K153401 | 0.84 | -0.69 | 0.50 | † | † | † | † | |
S5 | 1 | K086101 | 0.73 | -0.71 | 0.36 | † | † | † | † |
2 | K081501 | 1.11 | 0.94 | 0.20 | † | † | † | † | |
3 | K081601 | 0.57 | 2.14 | † | -0.37 | 0.37 | † | † | |
4 | K087301 | 0.45 | -0.41 | † | 1.28 | -1.28 | † | † | |
5 | K081801 | 0.45 | 1.55 | † | 0.27 | -0.27 | † | † | |
6 | K081901 | 0.95 | 2.53 | 0.17 | † | † | † | † | |
7 | K082101 | 1.53 | 1.53 | 0.15 | † | † | † | † | |
8 | K082102 | 1.33 | 1.47 | 0.09 | † | † | † | † | |
9 | K082103 | 0.35 | 1.89 | 0.24 | † | † | † | † | |
10 | K0855CL | 0.46 | -0.53 | † | 0.61 | 0.33 | -0.95 | † | |
11 | K082301 | 0.99 | 0.79 | 0.09 | † | † | † | † | |
12 | K153501 | 1.02 | 1.15 | 0.23 | † | † | † | † | |
13 | K153502 | 0.95 | 0.98 | 0.27 | † | † | † | † | |
14 | K082501 | 0.36 | -0.07 | † | 1.34 | -1.34 | † | † | |
15 | K082601 | 2.06 | 1.12 | 0.25 | † | † | † | † | |
16 | K084202 | 0.73 | 2.27 | † | 0.06 | -0.06 | † | † | |
17 | K084208 | 1.02 | 0.80 | 0.24 | † | † | † | † | |
S6 | 1 | K107301 | 0.65 | -1.96 | 0.22 | † | † | † | † |
2 | K086501 | 1.39 | 1.05 | 0.39 | † | † | † | † | |
3 | K108001 | 1.43 | 0.68 | 0.20 | † | † | † | † | |
4 | K086601 | 0.38 | 1.55 | 0.29 | † | † | † | † | |
5 | K086602 | 0.73 | 1.00 | 0.26 | † | † | † | † | |
6 | K107902 | 0.56 | 0.82 | † | 0.58 | -0.58 | † | † | |
7 | K086801 | 0.89 | -0.27 | 0.42 | † | † | † | † | |
8 | K0869CL | 0.49 | -0.87 | † | 1.05 | -0.91 | -0.14 | † | |
9 | K081701 | 0.88 | -0.33 | 0.13 | † | † | † | † | |
10 | K076501 | 0.52 | 0.22 | † | 0.84 | -0.84 | † | † | |
11 | K087402 | 0.27 | 1.50 | † | 3.51 | -0.14 | -3.38 | † | |
12 | K087501 | 1.16 | 0.78 | 0.28 | † | † | † | † | |
13 | K109102 | 0.46 | 1.95 | † | 1.04 | -1.04 | † | † | |
14 | K108701 | 0.66 | -1.40 | 0.25 | † | † | † | † | |
15 | K087701 | 1.32 | 0.72 | 0.20 | † | † | † | † | |
16 | K087901 | 1.22 | -1.02 | 0.29 | † | † | † | † | |
S7 | 1 | K076001 | 0.92 | -1.04 | 0.17 | † | † | † | † |
2 | K085001 | 0.79 | -1.57 | 0.25 | † | † | † | † | |
3 | K076801 | 0.56 | -0.37 | 0.21 | † | † | † | † | |
4 | K076802 | 0.73 | -0.54 | 0.27 | † | † | † | † | |
5 | K076302 | 0.81 | 0.53 | † | † | † | † | † | |
6 | K076601 | 0.57 | -0.21 | 0.21 | † | † | † | † | |
7 | K080703 | 0.62 | 2.28 | † | 0.48 | 1.01 | -1.49 | † | |
8 | K076901 | 0.58 | 1.07 | † | -0.15 | 0.15 | † | † | |
9 | K076401 | 0.57 | 3.03 | 0.38 | † | † | † | † | |
10 | K153601 | 0.68 | 0.39 | † | 0.12 | -0.12 | † | † | |
11 | K087101 | 0.80 | 0.88 | † | -0.34 | 0.34 | † | † | |
12 | K077001 | 1.23 | 1.24 | 0.22 | † | † | † | † | |
13 | K077201 | 0.61 | -0.38 | † | 0.08 | -0.08 | † | † | |
14 | K077301 | 0.94 | 0.04 | 0.43 | † | † | † | † | |
15 | K085101 | 0.82 | -0.36 | 0.32 | † | † | † | † | |
16 | K080401 | 1.53 | 1.26 | 0.38 | † | † | † | † | |
S8 | 1 | K078601 | 0.82 | -1.87 | 0.15 | † | † | † | † |
2 | K109901 | 0.68 | 0.12 | 0.27 | † | † | † | † | |
3 | K077501 | 0.43 | -0.87 | † | 0.47 | -0.47 | † | † | |
5 | K106501 | 0.94 | 2.44 | 0.08 | † | † | † | † | |
6 | K077701 | 0.42 | -0.18 | † | -0.27 | 0.27 | † | † | |
7 | K108501 | 1.21 | 1.49 | 0.23 | † | † | † | † | |
8 | K109301 | 1.24 | 1.27 | 0.24 | † | † | † | † | |
9 | K078102 | 0.34 | 1.40 | † | 0.05 | -1.82 | 1.77 | † | |
10 | K078103 | 0.36 | 2.85 | 0.22 | † | † | † | † | |
11 | K082401 | 1.15 | 1.39 | 0.42 | † | † | † | † | |
12 | K082402 | 1.64 | 1.51 | 0.28 | † | † | † | † | |
13 | K1097CL | 0.40 | 1.25 | † | 3.10 | 1.08 | -3.69 | -0.48 | |
14 | K078201 | 1.04 | 0.40 | 0.19 | † | † | † | † | |
15 | K078301 | 0.55 | 0.60 | † | 0.80 | -0.80 | † | † | |
16 | K085801 | 1.36 | -0.23 | 0.19 | † | † | † | † | |
S9 | 2 | K088001 | 0.96 | -0.07 | 0.31 | † | † | † | † |
3 | K088201 | 0.63 | 1.29 | 0.38 | † | † | † | † | |
4 | K088202 | 1.18 | 1.83 | 0.22 | † | † | † | † | |
5 | K088301 | 0.30 | -3.94 | 0.26 | † | † | † | † | |
6 | K088302 | 0.33 | -0.55 | † | 2.01 | -2.01 | † | † | |
7 | K088401 | 0.61 | 1.59 | † | 1.93 | 0.81 | 0.44 | -3.18 | |
8 | K084601 | 0.60 | -0.34 | 0.25 | † | † | † | † | |
9 | K109501 | 1.22 | 0.68 | 0.24 | † | † | † | † | |
10 | K109401 | 0.37 | -1.92 | 0.21 | † | † | † | † | |
11 | K109402 | 0.72 | 1.66 | † | -1.50 | 1.50 | † | † | |
13 | K089001 | 1.42 | 1.57 | 0.35 | † | † | † | † | |
14 | K1537CL | 0.46 | -0.76 | † | 0.18 | 1.92 | -2.11 | † | |
15 | K089201 | 0.86 | 1.35 | 0.28 | † | † | † | † | |
16 | K078401 | 0.70 | 1.30 | 0.19 | † | † | † | † | |
S10 | 1 | K153801 | 0.38 | -3.21 | 0.30 | † | † | † | † |
2 | K083701 | 0.73 | 0.04 | 0.16 | † | † | † | † | |
3 | K0829CL | 0.62 | 0.39 | † | 2.03 | -0.87 | -1.16 | † | |
4 | K153901 | 0.99 | 2.76 | 0.27 | † | † | † | † | |
5 | K154001 | 0.35 | 1.98 | † | 0.26 | -0.26 | † | † | |
7 | K083301 | 0.71 | 0.07 | 0.30 | † | † | † | † | |
8 | K083302 | 1.04 | 1.36 | 0.31 | † | † | † | † | |
9 | K083501 | 0.77 | -0.90 | 0.26 | † | † | † | † | |
10 | K083502 | 0.47 | 0.66 | † | 1.55 | -1.55 | † | † | |
11 | K081301 | 1.78 | 1.65 | 0.31 | † | † | † | † | |
12 | K083601 | 0.54 | -0.04 | 0.20 | † | † | † | † | |
13 | K085301 | 1.14 | 0.93 | 0.17 | † | † | † | † | |
14 | K085302 | 0.51 | 1.19 | † | 1.05 | -1.05 | † | † | |
15 | K083402 | 0.49 | 1.34 | † | 0.82 | 0.98 | -1.80 | † | |
16 | K081401 | 1.38 | 1.04 | 0.34 | † | † | † | † | |
17 | K154201 | 1.04 | 0.00 | 0.27 | † | † | † | † | |
S11 | 1 | K089601 | 0.35 | -2.22 | 0.15 | † | † | † | † |
2 | K154301 | 1.28 | 1.29 | 0.15 | † | † | † | † | |
3 | K085201 | 0.58 | -0.51 | 0.21 | † | † | † | † | |
4 | K089502 | 0.76 | -0.18 | † | † | † | † | † | |
5 | K088501 | 0.54 | 0.16 | 0.16 | † | † | † | † | |
6 | K089701 | 0.85 | 0.02 | 0.28 | † | † | † | † | |
7 | K089702 | 0.74 | 1.58 | 0.36 | † | † | † | † | |
8 | K106301 | 0.63 | 2.15 | † | 1.31 | 2.16 | -1.00 | -2.47 | |
9 | K076201 | 0.46 | 1.93 | † | -0.37 | 0.37 | † | † | |
10 | K106601 | 1.23 | 0.49 | 0.25 | † | † | † | † | |
11 | K106603 | 0.89 | 1.11 | † | -0.22 | 0.22 | † | † | |
12 | K106604 | 0.93 | 0.48 | 0.29 | † | † | † | † | |
13 | K107601 | 0.86 | 1.53 | 0.22 | † | † | † | † | |
14 | K080901 | 0.60 | -1.16 | † | † | † | † | † | |
15 | K107201 | 0.86 | -0.15 | 0.28 | † | † | † | † | |
16 | K107001 | 0.99 | -0.73 | 0.20 | † | † | † | † |