Table 2 Fit of PGWBI to the Rasch model
Item residual | Person residual | Chi square | PSI | Unidimensional test%(CI) | |||||
|---|---|---|---|---|---|---|---|---|---|
Analysis name | # of items | Mean | ±SD | Mean | ±SD | Value | p | ||
1. Pos Well Being | 4 | -0.24 | 0.96 | -0.42 | 0.84 | 27.9 | 0.68 | 0.81 | 5.59 (3.8-11.2) |
2. General Health | 3 | 0.42 | 0.92 | -0.40 | 0.95 | 12.6 | 0.18 | 0.59 | 1.12 (-0.2-4.3) |
3. Depressed Mood | 3 | -0.06 | 0.67 | -0.40 | 0.89 | 21.4 | 0.77 | 0.88 | 5.03 (1.8-8.2) |
4. Self Control | 3 | 0.21 | 0.34 | -0.30 | 0.77 | 9.5 | 0.40 | 0.65 | 2.79 (0.0-6.0) |
5. Anxiety | 5 | 0.28 | 1.74 | -0.41 | 1.15 | 51.8 | <0.00 | 0.81 | 7.26 (4.1-10.5) |
6. Anxiety | 3 | -0.10 | 1.66 | -0.58 | 1.19 | 15.8 | 0.08 | 0.72 | 3.37 (0.2-6.5) |
7. Vitality | 4 | 0.26 | 1.39 | -0.38 | 0.87 | 9.89 | 0.62 | 0.85 | 3.91 (0.7-7.1) |
8. Time 1 | 22 | 0.58 | 2.39 | -0.15 | 1.55 | 158.5 | < 0.01 | 0.92 | 25.7 (22.5-28.9) |
9. Six testlet | 6 (22) | 0.25 | 1.78 | -0.35 | 1.15 | 18.3 | 0.11 | 0.85 | 7.8 (4.6-11.0) |
10. Time 2 | 22 | 0.30 | 3.01 | -0.13 | 1.59 | 399.2 | <0.01 | 0.94 | 21.2 (18.0-24.4) |
11. Six testlet 2 | 3 (22) | 0.21 | 2.23 | -0.36 | 1.21 | 22.5 | 0.03 | 0.89 | 8.9 (5.7-12.1) |
12. Five testlet 2 | 5 (22) | 0.12 | 2.11 | -0.42 | 1.23 | 20.1 | 0.17 | 0.88 | 7.3 (4.1-10.5) |
13. Pooled | 2 (22) | 0.14 | 0.92 | -0.64 | 0.99 | 3.8 | 0.95 | 0.86 | 4.9 (2.6-7.1) |
Ideal Values | 0.0 | <1.4 a | 0.0 | <1.4 | >0.05 b | >0.85 | (LCI <5% ) | ||