Table 1.
Summary Rasch results for ACTIVLIM, INQoL, and EK scales.
| Rasch summary | Item fit | Person fit | Reliability | Item fit | Dependency | Test of unidimensionality | |||
|---|---|---|---|---|---|---|---|---|---|
| N (no. of extremes) available | Mean (SD) | Mean (SD) | Overall item-trait interaction chi 2 value (DF) | Psi with extremes | Ordered thresholds | Number of items with good fit* | Number of pairs of dependent items | Acceptable? | |
| ACTIVLIM | 787 (66) = 721 | −0.05 (1.963) | −0.37 (0.883) | 0.00 (162) | 0.95 | 18/18 (100 %) | 16/18 (89%) 16a / 16b | 2 | Not acceptable |
| INQoL | 660 (2) = 658 | 0.65 (3.039) | −0.09 (1.703) | 0.00 (351) | 0.95 | 15/39 (38%) |
20/39 (51%) 26a / 24b | 33 | Not acceptable |
| EK | 250 (5) = 245 | −0.22 (1.737) | −0.423 (0.576) | 0.00 (120) | 0.76 | 3/10 (30%) |
8/10 (80%) 8a / 9b | 0 | Acceptable |
*
Fit: defined as fit residual inside the recommended range (–2.50 to +2.50) a and nonsignificant v2 probability (p < 0.001) b.