Table 1.

Brain regions that showed positive activity for the main effects of peer presence > parental presence, separately for go and stop decisions at P < 0.005, FWE-cluster corrected

			MNI coordinates
Region	Volumea	t-value	x	y	z
Go decision peer > parent
L VS	87b	3.554	−14	22	−8
L precuneus	1081	3.837	2	−74	44
L cerebellum	176	3.823	−30	−72	−20
L TPJ	164	3.811	−50	−34	46
L STS	c	3.289	−54	−34	24
SMA	168	3.778	2	12	64
Stop decision peer > parent
L dorsolateral PFC	228	4.288	−18	48	26

Abbreviations: L = left, R = right, MNI = Montreal Neurological Institute. ^aVolume of activation in mm³. T-value is at local maximum. Analyses for negative relationships (i.e. parent > peer) showed no significant clusters of activation. ^bSmall-volume correction P < 0.005, 20 voxels. ^cPart of left TPJ cluster.