Table 2.

Group level activations from GLM analysis

Group level activations contrast	Region	X	Y	Z	Voxels	Max Z
Stimulus size lines	R occ fusiform	8	−76	−2	704	3.83
	R occ pole	16	−92	20	378	3.47
Stimulus size dots	L occ pole	−22	−98	−4	1188	4.64
	R occ pole	14	−96	−10	766	4.83
Criterion size lines	Temporal pole	−34	8	−32	264	3.24
Criterion size dots	Temporal fusiform	−40	−16	−34	426	4.19
Difficulty
Positive	R IFG	50	10	26	720	4.04
	R SPL	28	−56	38	793	3.97
	dmPFC	8	22	42	718	4.11
Negative	L IPS	−42	−64	34	3164	4.71
	R IPS	50	−72	20	1850	4.07
	PCC	8	−40	44	1368	4.51
	L dlPFC	−34	28	38	951	3.87
	R IPS	20	−84	20	467	3.46
Motor	L c gyrus	−44	−20	58	9233	5.81
Right hand	R cerebellum	16	−60	−26	1999	5.69
	R cerebellum	22	−70	−52	869	5.99
	R c gyrus	42	−12	56	9836	5.63
Left hand	L cerebellum	−18	−58	−30	1993	5.84
	L cerebellum	−14	−74	−50	257	3.65

Presented clusters were significant at the p < 0.05 level using cluster-based thresholding. Each contrast was relative to baseline. Voxel values are derived using a standard MNI-152 2 mm template. c, Cingulate; IFG, inferior frontal gyrus; L, left; occ, occipital; R, right.