Table 2.

Within- and between-group brain activation in all contrasts.

	Cluster size	xa	y	z	Tb
Moderately unfair > Fair offers
HC group
Dorsal anterior cingulate cortex / pre-SMA*	426	4	22	42	4.76
Left anterior insula*	86	–32	22	−6	4.14
Right anterior insula*	118	36	20	−6	3.80
BD group
Left middle insula*	679	−46	−4	10	−6.02
Right posterior insula*	206	50	−24	30	−5.25
Right middle insula*	288	44	−2	10	−4.93
HC > BD
Left middle insula*	411	−52	−4	10	4.35
Right posterior insula	53	46	−20	32	3.56
Right middle insula*	118	42	−2	10	3.46
Right anterior insula	99	36	14	−2	3.25
Very unfair > Fair offers
HC group
Right anterior insula*	156	38	20	−12	5.29
Left anterior insula*	73	−36	20	−8	3.92
Dorsal anterior cingulate cortex / pre-SMA	48	4	26	32	3.41
Ventromedial PFC	34	2	46	−14	−3.26
BD group
Left anterior insula / ventrolateral PFC*	183	−38	20	−12	5.39
Left middle insula*	731	−46	−6	8	−6.12
Right posterior insula*	273	44	−28	32	−4.98
Right middle insula*	488	48	2	2	−4.82
Rejected > Accepted offers
HC group
Ventromedial PFC*	107	2	48	−6	−3.73
BD group
Left ventrolateral PFC / Left anterior insula*	394	−38	22	−10	6.20
Right ventrolateral PFC / Right anterior insula	49	34	18	−20	3.43
Dorsal anterior cingulate cortex	112	2	26	34	3.27
Right middle insula*	300	52	2	18	−4.88
Left middle insula*	193	−46	−6	10	−4.68
HC > BD
Dorsal anterior cingulate cortex*	48	2	12	22	−4.02
Left ventrolateral PFC / Left anterior insula*	117	−46	18	−12	−3.72

^aCoordinates (x, y, z) reported in MNI space;

^bAll results significant at p < 0.05 cluster extent corrected across the set of predefined ROIs (p uncorrected < 0.005). Cluster size measured in voxels. Negative T values represent cluster that survived the opposite contrasts.

^*Clusters that survived a cluster extent corrected across the set of predefined ROIs with a p uncorrected < 0.001.