Table 3.

Inventory (proportion of behavioral categories) of RSMs observed

	Sibs-TD (n = 20)	Sibs-ASD (n = 20)	Sibs-ASD/ + (n = 8)	Sibs-ASD/ − (n = 12)
Body
Mean (SD)	0.35 (0.59)	0.75 (0.85)	1.13 (0.83)	0.50 (0.80)
Range	0–2	0–2	0–2	0–2
Object
Mean (SD)	1.85 (0.82)	2.40 (0.75)	2.13 (0.83)	2.58 (0.81)
Range	1–3	1–4	1–3	2–4

The ANOVA comparing Sibs-TD to Sibs-ASD revealed significant main effects for Sibling Group and RSM Type but no interaction. The ANOVA comparing Sibs-TD to Sibs-ASD/− revealed a significant main effect for RSM Type but no main effect of Sibling Group and no interaction

Italic values indicate standard deviations