Table 5. Estimates of item parameters, and item–rater interaction parameters βir.
i | Item parameters | Item–rater interaction parameter βir | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
α i | d i2 | d i3 | d i4 | Avg(βi) | β i1 | β i2 | β i3 | β i4 | β i5 | |
1 | 1.09 | -1.42 | 0.19 | 1.23 | -0.13 | 0.19 | -0.06 | -0.26 | -0.41 | -0.10 |
2 | 1.58 | -0.84 | -0.08 | 0.92 | 0.33 | 0.27 | 0.56 | 0.92 | -0.49 | 0.42 |
3 | 0.89 | 0.22 | 1.16 | -1.39 | -1.20 | -1.22 | -0.70 | -1.57 | -1.02 | -1.50 |
4 | 1.28 | 0.09 | -0.84 | 0.75 | 0.26 | 0.60 | 0.58 | 0.29 | -0.66 | 0.49 |
5 | 0.98 | 0.22 | 0.55 | -0.77 | -1.25 | -1.57 | -0.13 | -1.70 | -1.15 | -1.68 |
6 | 1.08 | -0.20 | -0.26 | 0.47 | -0.76 | -0.38 | -0.24 | -1.37 | -0.35 | -1.47 |
7 | 1.84 | 0.14 | -0.96 | 0.81 | -0.65 | -0.34 | -0.44 | -1.20 | -0.89 | -0.37 |
8 | 0.86 | -1.34 | 1.68 | -0.33 | 1.06 | 1.51 | 0.58 | 1.49 | 0.31 | 1.42 |
9 | 0.86 | 1.62 | 0.88 | -2.50 | -0.15 | -0.14 | -0.02 | -0.26 | -0.04 | -0.30 |
10 | 0.70 | -1.87 | 1.06 | 0.81 | 0.45 | 0.80 | 0.06 | 1.23 | -0.57 | 0.71 |
11 | 0.59 | 0.99 | -1.62 | 0.63 | 1.11 | 2.25 | 0.34 | 0.70 | 0.28 | 1.97 |
12 | 1.22 | 0.81 | -1.41 | 0.60 | 0.68 | 0.93 | 0.96 | 0.30 | 0.50 | 0.71 |
13 | 1.53 | 0.65 | -1.24 | 0.59 | 0.59 | 0.81 | 0.80 | 0.77 | -0.18 | 0.73 |
14 | 0.78 | 0.87 | -1.53 | 0.67 | 0.50 | 1.01 | 0.51 | 0.60 | -0.46 | 0.84 |
15 | 0.69 | 1.17 | 1.11 | -2.29 | -1.11 | -1.12 | -1.20 | -0.68 | -1.59 | -0.97 |
16 | 0.70 | 0.47 | -0.18 | -0.29 | -1.35 | -1.63 | -2.12 | -0.29 | -1.06 | -1.65 |
17 | 0.78 | 0.25 | -0.94 | 0.69 | 0.68 | 2.18 | -0.51 | -0.21 | -0.29 | 2.23 |
18 | 1.00 | 0.62 | -0.21 | -0.41 | 0.41 | 0.67 | 0.43 | 0.44 | -0.07 | 0.57 |
19 | 0.63 | -0.51 | -0.52 | 1.03 | 0.21 | 0.81 | 0.32 | -0.01 | -0.46 | 0.40 |
20 | 0.82 | 0.54 | -1.31 | 0.77 | 0.81 | 0.73 | 0.99 | 0.64 | 0.91 | 0.79 |
21 | 1.32 | -0.57 | -0.82 | 1.39 | -0.41 | -0.38 | -0.48 | -0.96 | -0.38 | 0.15 |
22 | 0.56 | 1.02 | -1.44 | 0.41 | 0.27 | 0.88 | -0.28 | -0.49 | 0.46 | 0.78 |
23 | 1.99 | -0.99 | 1.23 | -0.24 | -0.50 | -0.06 | -0.72 | -0.77 | -0.74 | -0.24 |
24 | 2.20 | -0.94 | 0.90 | 0.05 | -0.40 | -0.58 | 0.42 | -0.89 | -0.24 | -0.73 |
25 | 1.38 | -0.38 | 0.58 | -0.20 | -0.26 | -0.17 | 0.31 | -0.69 | -0.26 | -0.50 |
26 | 2.00 | -0.70 | -0.82 | 1.52 | -0.22 | -0.34 | 0.45 | -0.39 | -0.38 | -0.47 |
27 | 1.03 | -1.09 | -0.14 | 1.23 | -0.29 | -0.58 | 0.34 | -0.88 | -0.26 | -0.07 |
28 | 1.13 | -1.06 | 0.33 | 0.72 | -0.17 | -1.05 | 0.34 | -0.43 | 0.03 | 0.27 |
29 | 1.24 | -0.54 | -0.49 | 1.03 | 0.32 | -0.40 | 0.57 | 0.57 | 0.29 | 0.55 |
30 | 1.43 | -0.84 | -0.09 | 0.93 | 0.32 | 0.19 | 0.69 | 0.03 | 0.54 | 0.14 |