Table 1. Summary of the activation clusters in the whole-brain contrasts.

	Local Maxima	Cluster	Peak	cluster-level
Area	MNI Coordinates	size	T	p(FWE-cor)
Big Reward >Small Reward
Posterior Cingulate Cortex	18 −40 34	3574	5.54	0.000
Thalamus	0 −18 18		4.31
Inferior Parietal Cortex	−38 −28 30	598	4.33	0.001
Left Striatum	−10 14 2	290	3.78	0.026
Precuneus	6 −52 62		4.54
Superior Frontal Gyrus	24 42 16	786	4.19	0.000
Right Striatum	22 28 2		4.12
Anterior Cingulate Cortex	20 20 34		4.04
High Effort>Low Effort (*)
Left Striatum	−8 6 2	6574	6.43	0.000
Brainstem	−2 −28 −20		5.94
Right Striatum	10 10 −2		5.86
Right primary motor cortex	40 −2 40		5.77
Anterior Cingulate Cortex	8 12 46		5.35
Superior Frontal Gyrus	20 8 62		5.29
Right Precuneus	18 −68 38	1631	5.81	0.000
Inferior Parietal lobule	32 −50 46		5.09
Left Precuneus	−8 −72 38	543	5.57	0.000
Premotor cortex	−24 6 60	478	5.28	0.000
Left primary motor cortex	−38 6 36	358	5.19	0.000
Short Delay>Long Delay
Orbitofrontal Cortex	−22 44 −8	243	4.75	0.047
Effort-selective contrast (SVC)
Brainstem	−4 −32 −10	129	4.00	0.010

(*) voxel-level threshold p = 0.0001 uncorrected.

Legend: p(FWE)-cor = cluster-level family-wise error corrected p-values. SVC = small volume corrected. For regions including multiple local maxima, the highest local maximum is reported.