Table 12.

Correlation between language and tract-specific measurements

	Number of streamlines		Length of streamlines		Volume
	r value	p value	r value	p value	r value	p value
CC	.25	.25	-.06	.79	.24	.28
Cing left	-.11	.63	-.09	.67	.25	.25
Cing right	.24	.27	.14	.53	.21	.35
DAF left	.18	.41	.08	.70	.18	.42
DAF right	-.17	.45	-.08	.71	-.08	.71
IAAF left	-.06	.79	.55	.006**	.15	.48
IAAF right	.11	.63	.55	.009**	.28	.21
IPAF left	.03	.89	.14	.51	.05	.82
IPAF right	-.05	.80	-.29	.18	-.10	.64
	Fractional anisotropy		Mean diffusivity
	r value	p value	r value	p value
CC	.14	.53	-.58	.005**
Cing left	-.05	.83	-.20	.36
Cing right	.16	.47	-.03	.89
DAF left	-.04	.87	.26	.25
DAF right	-.002	.99	-.28	.25
IAAF left	.18	.42	-.48	.02*
IAAF right	-.18	.42	-.30	.17
IPAF left	.07	.75	-.29	.18
IPAF right	.18	.41	-.39	.07
	Parallel diffusivity		Perpendicular diffusivity
	r value	p value	r value	p value
CC	-.58	.005**	-.46	.03*
Cing left	.29	.19	-.16	.47
Cing right	.12	.60	.34	.12
DAF left	-.38	.08	-.21	.34
DAF right	.25	.29	-.17	.48
IAAF left	-.41	.06	-.43	.04*
IAAF right	.05	.82	-.33	.13
IPAF left	-.27	.20	-.26	.22
IPAF right	-.07	.74	.17	.43

ASD: Autism Spectrum Disorder; CC: corpus callosum; Cing: cingulum; DAF: direct segment of the arcuate fasciculus; IAAF: indirect anterior segment of the arcuate fasciculus; IPAF: indirect posterior segment of the arcuate fasciculus. r: Pearson’s correlation coefficient.

* Statistically significant at the threshold uncorrected p < .05.

** Significance level at the threshold uncorrected p < .01.