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 is 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), 2005 Science Assessment. |
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S4 | 12 | K090201 | 1.03 | 0.09 | 0.26 | † | † | † |
17 | K091601 | 0.86 | 1.55 | 0.24 | † | † | † | |
13 | K092801 | 0.68 | 3.00 | 0.00 | † | † | † | |
1 | K093001 | 0.81 | -0.89 | 0.38 | † | † | † | |
18 | K094901 | 0.54 | 3.28 | † | 1.60 | -1.60 | † | |
S6 | 10 | K031307 | 1.00 | 1.47 | † | 0.48 | -0.48 | † |
11 | K031308 | 0.60 | 2.76 | 0.00 | † | † | † | |
S8 | 1 | K041301 | 0.83 | -2.33 | 0.28 | † | † | † |
2 | K041302 | 0.91 | -1.44 | 0.36 | † | † | † | |
3 | K041303 | 0.72 | -1.22 | 0.20 | † | † | † | |
4 | K041304 | 0.60 | -0.31 | 0.08 | † | † | † | |
5 | K041305 | 1.46 | -0.58 | 0.25 | † | † | † | |
7 | K041307 | 0.43 | 1.84 | † | 0.09 | -0.09 | † | |
8 | K041401 | 1.08 | -0.24 | 0.00 | † | † | † | |
9 | K041402 | 1.12 | 1.54 | † | 1.09 | -1.09 | † | |
10 | K041403 | 0.35 | 2.65 | † | 1.11 | -1.11 | † | |
S9 | 12 | K060301 | 0.23 | 2.59 | † | † | † | † |
13 | K060302 | 1.05 | -0.79 | 0.39 | † | † | † | |
1 | K063401 | 1.07 | -0.60 | 0.33 | † | † | † | |
2 | K063402 | 0.92 | -0.69 | 0.40 | † | † | † | |
3 | K063403 | 0.61 | 1.10 | † | 1.47 | -1.47 | † | |
4 | K063404 | 0.45 | -0.14 | † | 1.25 | -1.25 | † | |
5 | K063405 | 0.65 | -1.26 | † | 0.16 | -0.16 | † | |
6 | K063406 | 0.89 | -0.12 | 0.00 | † | † | † | |
7 | K063407 | 1.06 | -0.15 | 0.00 | † | † | † | |
8 | K063408 | 0.99 | -0.64 | 0.25 | † | † | † | |
9 | K063409 | 0.34 | 1.50 | 0.10 | † | † | † | |
10 | K063410 | 0.52 | 0.01 | † | -0.08 | 0.08 | † | |
11 | K063411 | 0.99 | -0.07 | 0.20 | † | † | † | |
S10 | 8 | K090601 | 1.44 | 0.30 | 0.19 | † | † | † |
18 | K090701 | 0.46 | 1.31 | 0.38 | † | † | † | |
1 | K092301 | 0.82 | -1.07 | 0.46 | † | † | † | |
16 | K092901 | 0.52 | 1.47 | 0.15 | † | † | † | |
17 | K096101 | 0.86 | 1.25 | † | 0.98 | -0.98 | † | |
2 | K098801 | 1.37 | -0.03 | 0.24 | † | † | † | |
19 | K098901 | 0.46 | 0.16 | 0.21 | † | † | † | |
5 | K099001 | 0.50 | -0.20 | † | 1.71 | -1.71 | † | |
S11 | 8 | K047501 | 0.29 | 2.48 | 0.22 | † | † | † |
10 | K047701 | 1.41 | 2.24 | 0.14 | † | † | † | |
11 | K047801 | 0.92 | 1.09 | 0.16 | † | † | † | |
13 | K048001 | 0.91 | 1.09 | † | 1.76 | -1.76 | † | |
15 | K091201 | 1.37 | 1.10 | 0.20 | † | † | † | |
14 | K095001 | 0.79 | 1.04 | 0.22 | † | † | † | |
S12 | 3 | K048401 | 0.55 | 0.66 | 0.19 | † | † | † |
8 | K048901 | 0.58 | 0.38 | † | 0.26 | -0.26 | † | |
10 | K049201 | 0.16 | -0.10 | 0.25 | † | † | † | |
11 | K049301 | 0.22 | 6.25 | 0.00 | † | † | † | |
S13 | 2 | K035501 | 0.75 | -0.58 | 0.56 | † | † | † |
6 | K035901 | 0.59 | 1.00 | 0.00 | † | † | † | |
12 | K036501 | 0.73 | 0.94 | 0.33 | † | † | † | |
14 | K036801 | 0.46 | 1.31 | † | -0.83 | 0.83 | † | |
S14 | 1 | K037001 | 0.90 | 0.04 | 0.25 | † | † | † |
2 | K037101 | 0.21 | -2.45 | 0.26 | † | † | † | |
3 | K037201 | 0.97 | -0.61 | 0.38 | † | † | † | |
11 | K038001 | 0.62 | 1.32 | 0.19 | † | † | † | |
12 | K038002 | 1.06 | 1.24 | 0.16 | † | † | † | |
13 | K038101 | 0.61 | 2.41 | † | † | † | † | |
S15 | 1 | K063601 | 0.58 | -1.14 | 0.33 | † | † | † |
4 | K063901 | 0.44 | 1.88 | † | 0.52 | -0.52 | † | |
10 | K064501 | 0.52 | 0.42 | † | 1.65 | -0.27 | -1.38 | |
13 | K064801 | 0.71 | 1.63 | † | 1.71 | -1.71 | † | |
14 | K064802 | 0.44 | -0.19 | † | 1.11 | -1.11 | † | |
15 | K064803 | 0.69 | 0.66 | † | 0.79 | -0.79 | † | |
17 | K065001 | 0.62 | -0.62 | 0.16 | † | † | † | |
S16 | 6 | K065601 | 0.51 | 1.07 | † | 0.02 | 1.84 | -1.86 |
9 | K065901 | 0.55 | 1.20 | † | 1.43 | -0.66 | -0.78 | |
10 | K065902 | 0.71 | 0.42 | † | † | † | † | |
13 | K066201 | 0.93 | -0.81 | 0.24 | † | † | † | |
S17 | 3 | K066601 | 0.75 | 1.20 | 0.31 | † | † | † |
4 | K066701 | 0.52 | -0.33 | † | 0.98 | -0.98 | † | |
9 | K067201 | 0.59 | -0.08 | † | 0.88 | -0.88 | † | |
12 | K067501 | 1.54 | 0.60 | 0.42 | † | † | † | |
13 | K067601 | 1.09 | 0.28 | 0.16 | † | † | † | |
14 | K067701 | 0.48 | 0.94 | † | 1.11 | 0.19 | -1.30 | |
16 | K067901 | 0.57 | 0.81 | † | 0.74 | -0.74 | † | |
17 | K068001 | 1.10 | 0.34 | 0.52 | † | † | † | |
18 | K068101 | 0.33 | -1.76 | 0.33 | † | † | † | |
S18 | 4 | K063001 | 0.78 | 0.45 | † | 0.05 | -0.05 | † |
3 | K068401 | 0.65 | -0.02 | 0.22 | † | † | † | |
5 | K068601 | 1.09 | 0.32 | 0.30 | † | † | † | |
7 | K068801 | 0.66 | 0.74 | † | 0.58 | -0.58 | † | |
8 | K068901 | 0.42 | -0.77 | 0.17 | † | † | † | |
10 | K069101 | 0.71 | 0.66 | † | -0.45 | 0.45 | † | |
11 | K069201 | 0.72 | -0.57 | 0.18 | † | † | † | |
14 | K069501 | 0.47 | 0.14 | † | 2.72 | -2.72 | † | |
17 | K069801 | 0.73 | 1.02 | † | 0.69 | -0.69 | † |