Table 5.
Scale-Level descriptive statistics, reliability, and convergent and discriminant validity, Child Self-Report Edition
| Item Bank, 42 Items | SF8a, Items | SF8b, 8 Items | SF4a, 4 Items | |
|---|---|---|---|---|
|
| ||||
| Descriptive Statistics (Study 1, n=1,992) | ||||
| Range | 13.3–68.3 | 20.4–62.5 | 17.8–62.9 | 21.3–60.6 |
| Mean (SD) | 47.7 (10.3) | 47.6 (9.7) | 47.7 (9.6) | 47.6 (9.4) |
| Floor, n (%) | 2 (0.1%) | 17 (0.9%) | 8 (0.4%) | 18 (0.9%) |
| Ceiling, n (%) | 135 (6.6%) | 304 (15.3%) | 282 (14.2%) | 407 (20.4%) |
|
| ||||
| Reliability | ||||
| Marginal Reliability | 0.96 | 0.93 | 0.90 | 0.89 |
| Test-Retest ICC (Study 1 Retest Sample, n=101) | 0.79 | 0.81 | 0.80 | 0.80 |
|
| ||||
| Existing Life Satisfaction Measures, Pearson’s r | ||||
| Satisfaction with Life Scale (Study 2, n=495) | - | 0.71 | - | 0.70 |
| Cantril’s Ladder (Study 2, n=504) | - | 0.67 | - | 0.64 |
| Student’s Life Satisfaction Scale (Study 2, n=492) | - | 0.71 | - | 0.71 |
|
| ||||
| Convergent Validity with PROMIS Measures, Pearson’s r | ||||
| Positive Affect (Study 1, n=1,033) | 0.82 | 0.81 | 0.79 | 0.77 |
| Meaning and Purpose (Study 1, n=1,065) | 0.74 | 0.72 | 0.73 | 0.71 |
| Peer Relationships (Study 2, n=996) | - | 0.56 | - | 0.53 |
| Physical Function-Mobility (Study 2, n=996) | - | 0.33 | - | 0.31 |
|
| ||||
| Discriminant Validity with PROMIS Measures, Pearson’s r | ||||
| Anger (Study 1, n=222) | −0.59 | −0.60 | −0.63 | −0.61 |
| Anxiety (Study 1, n=225) | −0.36 | −0.37 | −0.42 | −0.41 |
| Depressive Symptoms (Study 1, n=225) | −0.59 | −0.59 | −0.63 | −0.63 |
| Psychological Stress Experiences (Study 2, n=992) | - | −0.62 | - | −0.61 |
| Fatigue (Study 2, n=996) | - | −0.50 | - | −0.48 |
Note: SF4a: 4-item life satisfaction short form; SF8a: 8-item life satisfaction short form that includes the 4-item form and 4 additional global life satisfaction items; and, SF8b: 8-item life satisfaction short form that includes the 4-item form and 4 additional context-specific life satisfaction items.