IRT parameters for the physical science scale, by block and item, grade 8 science national main assessment (accommodations not permitted [R2]): 2000
Block |
Item |
NAEP ID |
aj |
bj |
cj |
dj1 |
dj2 |
dj3 |
S3 |
1 |
K040601 |
0.63 |
-0.06 |
0.00 |
† |
† |
† |
2 |
K0406CL |
0.68 |
0.91 |
0.00 |
-0.07 |
0.07 |
† |
3 |
K040603 |
0.66 |
-0.74 |
0.00 |
† |
† |
† |
4 |
K040604 |
0.69 |
0.09 |
0.00 |
† |
† |
† |
5 |
K040605 |
0.43 |
0.57 |
0.00 |
0.23 |
-0.23 |
† |
6 |
K040606 |
0.92 |
-0.24 |
0.00 |
1.76 |
-1.76 |
† |
S6 |
6 |
K031309 |
0.25 |
-2.83 |
0.00 |
-5.76 |
2.79 |
2.98 |
7 |
K031302 |
0.60 |
0.93 |
0.00 |
† |
† |
† |
8 |
K031305 |
0.81 |
1.50 |
0.00 |
† |
† |
† |
9 |
K031306 |
0.64 |
2.94 |
0.00 |
† |
† |
† |
S10 |
9 |
K095901 |
0.57 |
1.28 |
0.00 |
1.18 |
-1.18 |
† |
10 |
K093601 |
0.80 |
1.80 |
0.00 |
0.53 |
-0.53 |
† |
11 |
K095301 |
0.76 |
0.57 |
0.42 |
† |
† |
† |
14 |
K095101 |
0.94 |
0.83 |
0.29 |
† |
† |
† |
15 |
K095801 |
0.60 |
1.32 |
0.00 |
† |
† |
† |
16 |
K095501 |
1.44 |
1.45 |
0.15 |
† |
† |
† |
S11 |
4 |
K042801 |
0.96 |
1.15 |
0.16 |
† |
† |
† |
5 |
K042901 |
2.35 |
1.62 |
0.25 |
† |
† |
† |
10 |
K043201 |
0.37 |
0.16 |
0.22 |
† |
† |
† |
13 |
K043501 |
0.66 |
-0.06 |
0.00 |
1.39 |
-1.39 |
† |
14 |
K043601 |
0.81 |
-0.14 |
0.00 |
† |
† |
† |
15 |
K043602 |
0.50 |
2.87 |
0.00 |
-0.67 |
0.67 |
† |
16 |
K043603 |
0.65 |
-0.95 |
0.00 |
† |
† |
† |
S12 |
1 |
K046801 |
0.54 |
0.62 |
0.27 |
† |
† |
† |
2 |
K046901 |
0.96 |
0.39 |
0.24 |
† |
† |
† |
4 |
K047101 |
1.13 |
0.17 |
0.20 |
† |
† |
† |
5 |
K047201 |
0.47 |
0.34 |
0.00 |
0.15 |
-1.31 |
1.16 |
7 |
K047401 |
0.60 |
0.86 |
0.00 |
-0.48 |
0.48 |
† |
12 |
K047901 |
1.00 |
0.28 |
0.00 |
† |
† |
† |
S13 |
1 |
K048201 |
1.21 |
0.69 |
0.19 |
† |
† |
† |
4 |
K048501 |
0.99 |
1.08 |
0.28 |
† |
† |
† |
5 |
K048601 |
0.53 |
1.00 |
0.00 |
1.14 |
-1.14 |
† |
9 |
K049001 |
0.62 |
3.18 |
0.00 |
-1.70 |
1.70 |
† |
10 |
K049101 |
0.61 |
-0.41 |
0.12 |
† |
† |
† |
S14 |
1 |
K035401 |
1.23 |
1.37 |
0.46 |
† |
† |
† |
3 |
K035601 |
0.28 |
0.77 |
0.00 |
† |
† |
† |
4 |
K035701 |
1.18 |
0.62 |
0.21 |
† |
† |
† |
5 |
K035801 |
0.57 |
-0.58 |
0.00 |
-0.31 |
0.31 |
† |
8 |
K036201 |
1.09 |
0.54 |
0.17 |
† |
† |
† |
9 |
K036301 |
0.63 |
0.37 |
0.00 |
-1.23 |
1.23 |
† |
13 |
K036601 |
0.53 |
-0.38 |
0.11 |
† |
† |
† |
16 |
K036901 |
0.78 |
-0.47 |
0.12 |
† |
† |
† |
S15 |
4 |
K037301 |
0.42 |
0.97 |
0.00 |
-2.14 |
2.14 |
† |
6 |
K037501 |
0.78 |
1.95 |
0.00 |
-0.30 |
0.30 |
† |
8 |
K037701 |
0.36 |
-2.64 |
0.00 |
-0.40 |
1.97 |
-1.58 |
9 |
K037703 |
0.50 |
0.65 |
0.00 |
0.27 |
-0.27 |
† |
11 |
K037901 |
0.90 |
1.78 |
0.16 |
† |
† |
† |
16 |
K038301 |
0.89 |
1.30 |
0.00 |
2.05 |
0.88 |
-0.80 |
S20 |
2 |
K094001 |
0.33 |
1.48 |
0.23 |
† |
† |
† |
4 |
K096001 |
0.56 |
0.22 |
0.25 |
† |
† |
† |
6 |
K095601 |
1.18 |
0.00 |
0.22 |
† |
† |
† |
7 |
K095401 |
0.56 |
2.69 |
0.00 |
0.95 |
-0.95 |
† |
11 |
K096201 |
0.80 |
1.31 |
0.22 |
† |
† |
† |
14 |
K095201 |
0.73 |
0.74 |
0.23 |
† |
† |
† |
15 |
K093701 |
0.61 |
1.08 |
0.00 |
0.58 |
-0.58 |
† |
16 |
K097001 |
0.27 |
3.23 |
0.00 |
0.70 |
-0.70 |
† |
S21 |
3 |
K045401 |
1.29 |
0.46 |
0.57 |
† |
† |
† |
4 |
K045501 |
0.62 |
0.76 |
0.26 |
† |
† |
† |
7 |
K045801 |
0.61 |
1.14 |
0.00 |
1.54 |
-1.54 |
† |
8 |
K045901 |
1.23 |
1.19 |
0.42 |
† |
† |
† |
11 |
K046201 |
0.83 |
1.81 |
0.34 |
† |
† |
† |
14 |
K046501 |
0.69 |
1.17 |
0.00 |
0.71 |
-0.71 |
† |
15 |
K046601 |
0.82 |
0.17 |
0.00 |
† |
† |
† |
Last updated 15 July 2008 (DR)
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