Table 4.
Psychometric properties of Yale Food Addiction Scale for children (YFAS-C) in scale level
| Psychometric testing | YFAS-C | Suggested cutoff |
|---|---|---|
| Internal consistency (Kuder–Richardson Formula 20) | 0.81 | > 0.7 |
| Confirmatory factor analysis | ||
| χ2 (df) | 775.39 (209)* | Non-significant |
| Comparative fit index | 0.93 | > 0.9 |
| Tucker–Lewis index | 0.91 | > 0.9 |
| Root-mean square error of approximation | 0.048 | < 0.08 |
| Standardized root mean square residual | 0.040 | < 0.08 |
| Item separation reliability from item response theory | 0.98 | > 0.7 |
| Item separation index from item response theory | 8.01 | > 2 |
| Person separation reliability from item response theory | 0.77 | > 0.7 |
| Person separation index from item response theory | 2.04 | > 2 |
| Test–retest reliability by intraclass correlation coefficient | 0.83 | > 0.4 |
*p < 0.001