Table 4. Average item endorsability thresholds, including fit statistics.
| Original (25- item) | Short form (9-item) | |||||||
|---|---|---|---|---|---|---|---|---|
| Item | Measure (Logits) | SE | Infit (mnsq) | Outfit (mnsq) | Measure (Logits) | SE | Infit (mnsq) | Outfit (mnsq) |
| 2 | -1.53 | 0.04 | 0.94 | 1.03 | -1.27 | 0.05 | 0.97 | 1.01 |
| 18 | -1.46 | 0.04 | 1.19 | 1.20 | -1.18 | 0.05 | 1.14 | 1.12 |
| 1 | -1.10 | 0.05 | 0.72 | 0.72 | -0.73 | 0.05 | 0.70 | 0.71 |
| 12 | -0.50 | 0.05 | 0.85 | 0.84 | 0.03 | 0.06 | 0.94 | 0.91 |
| 8 | -0.50 | 0.05 | 0.67 | 0.65 | - | - | - | - |
| 25 | -0.45 | 0.05 | 1.40 | 1.43 | - | - | - | - |
| 5 | -0.41 | 0.05 | 1.35 | 1.53 | - | - | - | - |
| 14 | 0–0.31 | 0.05 | 1.26 | 1.26 | - | - | - | - |
| 10 | -0.23 | 0.05 | 0.94 | 0.98 | 0.38 | 0.06 | 1.05 | 1.07 |
| 17 | -0.08 | 0.05 | 0.61 | 0.59 | - | - | - | - |
| 13 | -0.04 | 0.05 | 0.72 | 0.66 | 0.60 | 0.06 | 0.94 | 0.84 |
| 4 | -0.04 | 0.05 | 1.37 | 1.45 | - | - | - | - |
| 15 | -0.04 | 0.05 | 0.78 | 0.73 | 0.61 | 0.06 | 1.01 | 0.98 |
| 9 | -0.02 | 0.05 | 1.00 | 0.93 | 0.64 | 0.06 | 1.15 | 1.05 |
| 22 | 0.01 | 0.06 | 1.15 | 1.00 | - | - | - | - |
| 16 | 0.14 | 0.06 | 0.65 | 0.57 | - | - | - | - |
| 21 | 0.18 | 0.06 | 1.27 | 1.27 | - | - | - | - |
| 23 | 0.21 | 0.06 | 0.97 | 0.98 | 0.92 | 0.07 | 1.26 | 1.29 |
| 20 | 0.51 | 0.07 | 1.41 | 1.25 | - | - | - | - |
| 7 | 0.52 | 0.07 | 1.33 | 1.18 | - | - | - | - |
| 3 | 0.70 | 0.07 | 1.22 | 0.97 | - | - | - | - |
| 19 | 0.79 | 0.07 | 1.40 | 1.10 | - | - | - | - |
| 6 | 0.96 | 0.08 | 1.29 | 1.25 | - | - | - | - |
| 11 | 1.13 | 0.09 | 1.29 | 1.03 | - | - | - | - |
| 24 | 1.57 | 0.11 | 1.37 | 0.93 | - | - | - | - |
Bold type indicates excessive item misfit.
Negative item measures indicate items that are easier to endorse, and positive measures indicate items that are more difficult to endorse. SE = standard error of measure, mnsq = mean square (chi-square based fit statistic).