Table 2.
Information on scales that formed part of the present analyses
| n | No. items | Relia- bility (alpha) | Total score | Item score | |||||
|---|---|---|---|---|---|---|---|---|---|
| Mean | SD | Range | Mean | SD | Range | ||||
| Parenting measures | |||||||||
| Discipline (PBS) | 222 | 6 | .84 | 7.52 | 4.90 | 0–19 | 1.25 | .82 | 0–3.2 |
| Rules (PBS) | 222 | 4 | .81 | 9.85 | 3.84 | 0–16 | 2.46 | .96 | 0–4 |
| Positive parenting (PBS) | 222 | 8 | .72 | 25.06 | 4.32 | 13–32 | 3.13 | .54 | 1.6–4 |
| Stimulating development (PBS) | 222 | 10 | .84 | 28.31 | 6.07 | 12–40 | 2.83 | .61 | 1.2–4 |
| Adapting the environment (PBS) | 222 | 6 | .58 | 14.20 | 3.99 | 3–24 | 2.37 | .66 | 0.5–4 |
| Parental involvement (APQ) | 222 | 10 | .72 | 26.42 | 6.70 | 7–40 | 2.64 | .67 | 0.7–4 |
| Positive parenting (APQ) | 222 | 6 | .84 | 18.51 | 4.05 | 5–24 | 3.09 | .67 | 0.8–4 |
| Poor supervision (APQ) | 221 | 10 | .67 | 2.37 | 3.18 | 0–18 | .24 | .32 | 0–1.8 |
| Inconsistent discipline (APQ) | 222 | 6 | .65 | 7.47 | 3.68 | 0–17 | 1.25 | .61 | 0–2.8 |
| Physical punishment (APQ) | 222 | 3 | .91a | .27 | .76 | 0–4 | .09 | .25 | 0–1.3 |
| Child measures | |||||||||
| ASD symptoms (SCQ) | 221 | 39 | .80 | 24.12 | 6.18 | 12–38 | .62 | .16 | 0.3–1 |
| Reactivity (EDI) | 222 | 24 | .97 | 61.48 | 21.91 | 7–96 | 2.56 | .91 | 0.3–4 |
| Demand-specific (HSQ) | 222 | 12 | .90 | 66.07 | 23.72 | 3–106 | 5.51 | 1.98 | 0.3–8.8 |
| Socially inflexible (HSQ) | 221 | 12 | .88 | 69.34 | 21.50 | 6–108 | 5.78 | 1.79 | 0.5–9 |
| Extreme demand avoidance (EDA) | 221 | 20 | .91 | 47.81 | 13.37 | 4–68 | 2.08 | .58 | 0.2–3 |
| Intolerance of uncertainty (IU) | 222 | 12 | .89 | 33.76 | 9.7 | 6–48 | 2.81 | .81 | 0.5–4 |
aReliability coefficient based on two items, due to absence of variance on one item