Table 2.
Test–retest reliability, internal consistency, and scale descriptions
| Dimensions | Number of items | Test–retest reliability ICC |
Internal consistency reliability Cronbach’s alpha |
Number of responders | % Missing | % Floor | % Ceiling |
|---|---|---|---|---|---|---|---|
| Children | n = 259 | n = 1058 | |||||
| Total | 52 | 1274 | |||||
| Physical Well-being | 5 | 0.73 | 0.85 | 1260 | 1.1 | 0.1 | 19.7 |
| Psychological Well-being | 6 | 0.74 | 0.93 | 1267 | 0.5 | 0.2 | 24.7 |
| Moods & Emotions | 7 | 0.66 | 0.88 | 1264 | 0.8 | 0.4 | 14.4 |
| Self-Perception | 5 | 0.67 | 0.68 | 1255 | 1.5 | 0.1 | 8.3 |
| Autonomy | 5 | 0.66 | 0.82 | 1267 | 0.5 | 0.2 | 12.6 |
| Parent Relations & Home Life | 6 | 0.87 | 0.92 | 1260 | 1.1 | 0.2 | 24.5 |
| Financial Resources | 3 | 0.65 | 0.89 | 1210 | 5.0 | 7.4 | 23.8 |
| Social Support & Peers | 6 | 0.76 | 0.89 | 1270 | 0.3 | 0.2 | 25.0 |
| School Environment | 6 | 0.80 | 0.91 | 1255 | 1.5 | 0.2 | 17.5 |
| Social Acceptance (Bullying) | 3 | 0.61 | 0.77 | 1255 | 1.5 | 1.0 | 43.5 |
| Parents | n = 244 | n = 880 | |||||
| Total | 52 | 982 | |||||
| Physical Well-being | 5 | 0.70 | 0.89 | 946 | 3.7 | 0.0 | 14.5 |
| Psychological Well-being | 6 | 0.72 | 0.94 | 976 | 0.6 | 0.0 | 11.9 |
| Moods & Emotions | 7 | 0.71 | 0.89 | 978 | 0.4 | 0.1 | 7.4 |
| Self-Perception | 5 | 0.71 | 0.71 | 966 | 1.6 | 0.0 | 4.6 |
| Autonomy | 5 | 0.67 | 0.85 | 974 | 0.8 | 0.0 | 6.2 |
| Parent Relations & Home Life | 6 | 0.70 | 0.90 | 973 | 0.9 | 0.1 | 6.0 |
| Financial Resources | 3 | 0.67 | 0.92 | 952 | 3.1 | 7.4 | 15.3 |
| Social Support & Peers | 6 | 0.69 | 0.92 | 961 | 2.1 | 0.3 | 13.5 |
| School Environment | 6 | 0.75 | 0.90 | 965 | 1.7 | 0.0 | 8.5 |
| Social Acceptance (Bullying) | 3 | 0.56 | 0.85 | 973 | 0.9 | 0.2 | 42.8 |
ICC intraclass correlation coefficient, % Missing percentage of values which were missing, % Floor / % Ceiling percentage of scores at the extremes of the scale range