Table 1:

A listing of p-values and direction of effects for relevant statistical comparisons of Oxy and Deoxy FA data

Within-group differences		Between-group differences
HR infants	LR infants	Hemisphere/Conditions
1) R Oxy, Social < Pre-Social, p=0.04*	1) R Oxy, Social & Post-Social > Pre-Social, ps=0.09|	1) Oxy, R Social	- LR >HR, p=0.004*. ~Also seen in R upper ROI, p=0.006*
2) R Deoxy, Post-Social > Pre-social, p=0.08|	2) R Deoxy, Post-Social > Pre-Social, p=0.01*	2) Oxy, R Post-Social	- LR >HR, p=0.02*. ~ Also seen in R mid ROI, p=0.03*
		3) Deoxy, L Pre-Social	- LR >HR, p=0.05| .~Seen in R upper and mid ROIs, ps=0.1|
		4) Deoxy, L Social	- LR >HR, p=0.0002*.~Also seen in L upper (p=0.002*) and lower (p=0.01*) ROIs
		5) Deoxy, R Post-Social	- LR >HR, p=0.07|.~Similar trend in R lower RO1, p=0.06|

^*= p < 0.05

^|= 0.05–0.1; HR=High-risk, LR=Low-risk.

~Note that when present, we are also reporting consistent trends in the upper and lower ROIs of the right &/or left hemispheres.

R=right, L=left