Table 1.

Descriptive data comparing diagnostic groups on age, IQ, autism symptoms, and frontal EEG asymmetry

Measure	HFA group (N = 35)			Comparison group (N = 28)			t-value, p-value
	M	SD	Range	M	SD	Range
Age (years, months)	12, 2	2, 0	8, 1–15, 2	12, 0	1, 9	8, 0–15, 2	.32, ns
Prorated VCI	105.00	15.51	81–140	106.82	11.15	89–130	−.52, ns
Prorated PRI	102.74	17.15	67–137	101.75	7.93	86–117	.30, ns
SCQ total	17.42	5.42	4–28	3.42	2.57	0–10	13.49, <.001
ASSQ	27.31	5.46	11–43	5.46	4.53	0–14	13.55, <.001
Midfrontal asymmetry	.016	0.09	−.16–.29	−0.007	0.11	−.25–.18	.92, ns
Lateral frontal asymmetry	.017	0.17	−.34–.35	.022	0.18	−.23–.47	−.12, ns
Mid-frontal asymmetry groupings
Left n	19			13
Right n	16			15
Lateral frontal asymmetry groupings
Left n	18			13
Right n	17			15

VCI WISC-IV verbal comprehension index, PRI WISC-IV perceptual reasoning index, SCQ total social communication questionnaire, ASSQ total autism spectrum screening questionnaire