Table 1.

Participant characteristics

	Full sample			Low-motion subsample
	Group		Group matching	Group		Group matching
	ASD (N = 37)	TD (N = 38)	P	ASD (N = 32)	TD (N = 33)	P
Age	13.9 (2.6), 9–17	13.0 (2.6), 8–17	0.143	14.2 (2.5), 9–17	13.2 (2.7), 8–17	0.114
Sex (male:female)	32:5	30:8	0.395	29:3	28:5	0.304
Handedness (right:left)	32:5	31:7	0.568	27:5	26:7	0.562
Verbal IQ	105.5 (19.3), 55–147	107.8 (11.8), 73–133	0.537	106.7 (18.5), 70–147	108.8 (10.4), 87–133	0.561
Nonverbal IQ	104.4 (16.9), 62–140	107.5 (12.5), 83–137	0.375	104.9 (15.8), 70–140	109.0 (11.8), 88–137	0.251
Root mean square of displacement (before censoring)	0.071 (0.039), 0.019–0.166	0.071 (0.048), 0.017–0.246	0.950	0.062 (0.031), 0.019–0.148	0.057 (0.028), 0.017–0.121	0.501
Root mean square of displacement (after censoring)	0.065 (0.031), 0.019–0.122	0.064 (0.039), 0.017–0.215	0.925	0.058 (0.029), 0.019–0.119	0.053 (0.022), 0.017–0.096	0.373

Values shown: mean (SD), range. Significance value, P, for group matching in χ² tests (age, sex) and t-tests (all others).

ASD, autism spectrum disorder; TD, typically developing.