Table 5.

ROI ANCOVAs controlling for Age, Head Circumference, and PIQ

Structure	Mean ASD (SD) N=59	Mean TD (SD) N=30	F	p	ρη2
Thalamus	16.92 (1.46)	17.05 (2.17)	0.09	.76	.001
Precentral	30.84 (4.51)	31.48 (3.78)	0.35	.55	.004
Postcentral	21.28 (3.83)	21.91 (2.93)	1.06	.31	.013
Caudal Middle Frontal	17.26 (3.44)	17.98 (3.30)	0.18	.67	.002
Basal Ganglia	25.46 (2.44)	25.02 (3.07)	2.38	.13	.030
Cerebellum	124.97 (13.34)	127.55 (14.38)	0.01	.92	<.001

Note. ROI volumes combine left and right hemisphere volumes for each ROI structure. ROI units are measured in centimeters cubed. Basal Ganglia comprised the caudate, putamen, and pallidum volumes. ρη² = partial eta squared. Partial eta squared is the default effect size measure reported in SPSS. If you have only one predictor variable, then partial eta squared is equivalent to eta squared. TD = typically-developing; ASD = Autism Spectrum Disorder.

^*p<.05

^**p<.01.