Table 2.

Brain activations revealed by the PPI covariate contrast (p < 0.005 uncorrected at voxel level, cluster-level p < 0.05, FWE corrected)

Regions	Hemi	Max T-value	Cluster size (voxels)	MNI coordinates
				x	y	z
Partner_Waive > Computer_Waivea
dmPFC	L/R	5.83	1651	12	41	46
dlPFC	L	5.53	178	−36	11	43
	R	4.79	136	57	14	37
Insula	L	4.79	149	−30	14	−14
	R	5.35	197	45	17	−14
Precuneus	L/R	5.14	856	0	−37	40
Angular	L	4.42	246	−51	−58	31
	R	5.07	285	48	−64	40
Partner_Retain > Computer_Retainb
dmPFC	L/R	6.26	1400	6	62	10
LOFC	L	4.11	48	−51	17	1
SFG	L	5.04	383	−42	14	40
Putamen	L	4.26	163	−24	14	13
STS	R	4.35	70	66	−10	−2
Precuneus	L/R	5.53	511	3	−55	31
Angular	L	4.81	496	−45	−49	28

dlPFC, dorsolateral prefrontal cortex; dmPFC, dorsomedial prefrontal cortex; LOFC, lateral orbitofrontal cortex; SFG, superior frontal gyrus; STS, superior temporal sulcus.

^aPositive correlation with allocation difference (Partner_Waive > Computer_Waive).

^bPositive correlation with allocation difference (Computer_Retain > Partner_Retain).