TABLE 4.
Item parameters of the scales (under the GRM).
| Item | a | b1 | b2 | b3 | b4 | b5 |
| ITS-1 | 0.96 | –2.08 | 0.69 | 1.96 | 3.63 | |
| ITS-2 | 1.00 | –2.15 | 0.08 | 1.58 | 3.66 | |
| ITS-3 | 0.38 | –9.64 | –4.04 | –1.03 | 2.49 | |
| ITS-4 | 0.99 | –3.28 | –0.84 | 0.45 | 2.23 | |
| ITS-5 | 0.83 | –2.57 | 0.08 | 1.54 | 4.07 | |
| ITS-6 | 0.84 | –4.23 | –1.87 | –0.10 | 2.08 | |
| ITS-7 | 0.72 | –4.15 | –1.83 | –0.15 | 1.65 | |
| ITS-8 | 0.59 | –6.70 | –2.03 | 0.18 | 3.37 | |
| ITS-9 | 0.82 | –1.92 | 0.85 | 2.54 | 5.03 | |
| ITS-10 | 1.00 | –2.29 | 0.03 | 1.45 | 3.93 | |
| ITS-11 | 1.15 | –2.05 | –0.03 | 1.16 | 2.89 | |
| ITS-12 | 1.48 | –3.76 | –1.67 | –0.65 | 0.89 | |
| ITS-13 | 0.68 | –2.81 | 0.27 | 2.59 | 5.83 | |
| ITS-14 | 1.14 | –3.42 | –1.03 | 0.56 | 2.72 | |
| ITS-15 | 0.74 | –4.64 | –1.27 | 0.80 | 3.11 | |
| ITS-16 | 0.83 | –5.29 | –1.89 | 0.50 | 3.60 | |
| ITS-17 | 0.40 | –7.64 | –1.84 | 2.04 | 7.72 | |
| ITS-18 | 0.43 | –5.71 | –0.43 | 3.00 | 8.84 | |
| ITS-19 | 1.02 | –3.30 | –0.54 | 1.02 | 3.14 | |
| ITS-20 | 0.87 | –4.58 | –1.66 | 0.43 | 3.80 | |
| ITS-21 | 0.06 | –25.88 | 6.15 | 27.34 | 67.55 | |
| ITS-22 | 0.88 | –4.26 | –1.60 | –0.01 | 2.22 | |
| ITS-23 | 0.57 | –5.12 | –1.19 | 1.23 | 5.16 | |
| ITS-24 | 0.29 | –13.83 | –4.30 | 3.64 | 13.13 | |
| ITS-25 | 0.78 | –4.90 | –1.86 | 0.12 | 3.01 | |
| RPHNS-1 | 1.12 | –2.18 | –0.49 | 0.81 | 1.55 | 2.92 |
| RPHNS-2 | 1.12 | –4.16 | –2.03 | –0.84 | 0.54 | 2.58 |
| RPHNS-3 | 1.18 | –3.66 | –1.32 | 0.19 | 1.40 | 2.76 |
| RPHNS-4 | 0.58 | –4.99 | –2.11 | 0.07 | 2.39 | 6.28 |
| RPHNS-5 | 0.96 | –3.37 | –1.64 | –0.19 | 1.38 | 3.41 |
| RPHNS-6 | 1.17 | –3.37 | –1.63 | –0.21 | 0.69 | 2.35 |
| RPHNS-7 | 1.16 | –3.59 | –1.64 | –0.40 | 0.96 | 3.07 |
| RPHNS-8 | 1.26 | –2.67 | –0.94 | 0.23 | 1.16 | 2.53 |
| RPHNS-9 | 1.35 | –3.02 | –1.77 | –0.52 | 0.37 | 1.33 |
| RPHNS-10 | 1.25 | –3.74 | –2.25 | –1.06 | –0.03 | 1.40 |
| RPHNS-11 | 0.77 | –3.30 | –0.69 | 1.20 | 3.10 | 6.05 |
| RPHNS-12 | 0.95 | –4.27 | –2.16 | –0.66 | 0.92 | 3.05 |
| RPHNS-13 | 1.49 | –2.42 | –1.07 | –0.03 | 0.98 | 2.14 |
| RPHNS-14 | 1.21 | –3.17 | –1.45 | –0.15 | 1.06 | 2.73 |
| RPHNS-15 | 1.28 | –3.44 | –1.81 | –0.70 | 0.47 | 1.76 |
| RPHNS-16 | 1.22 | –2.79 | –1.35 | 0.03 | 1.14 | 2.66 |
| RPHNS-17 | 0.57 | –7.44 | –3.37 | –0.90 | 1.82 | 5.95 |
| RPHNS-18 | 1.75 | –3.39 | –1.81 | –0.99 | 0.09 | 1.51 |
| RPHNS-19 | 1.10 | –3.60 | –1.46 | –0.07 | 1.07 | 2.44 |
| RPHNS-20 | 1.31 | –3.23 | –1.75 | –0.66 | 0.64 | 2.25 |