Table 3 Summary statistics for person and item parameters of the Catquest-9SF
From: Catquest-9SF questionnaire: validation of Malay and Chinese-language versions using Rasch analysis
Version | Parameter | Separation index | Reliability | Average infit mean square | Average outfit mean square | |
|---|---|---|---|---|---|---|
Malay | 9-items | Person ability | 2.84 | 0.89 | 1.00 | 1.01 |
Item difficulty | 4.81 | 0.96 | 1.00 | 1.00 | ||
7-itemsa | Person ability | 2.59 | 0.87 | 1.00 | 0.99 | |
Item difficulty | 4.97 | 0.96 | 1.00 | 0.98 | ||
Chinese | 9-items | Person ability | 2.59 | 0.87 | 1.00 | 1.01 |
Item difficulty | 6.96 | 0.98 | 1.00 | 1.02 | ||
7-itemsa | Person ability | 2.30 | 0.84 | 1.01 | 0.98 | |
Item difficulty | 5.28 | 0.97 | 1.00 | 0.98 |