Table 2.

Group Differences on the Probabilistic Category Learning Task in Whole-Brain Analyses

Region	Volume of Voxels (mm3)	Peak Activity MNI Coordinates			Maximum Z-Statistic	Exact P-Value
		x	y	z
Regions significantly more active for the comparison group than psychosis risk
Right caudate	197	12	14	8	3.78	0.0001
Right putamen		16	14	−6	3.97	4.7e-05
Right hippocampus		16	−12	−18	3.06	0.0012
Left thalamus		−4	−18	6	4.11	2.7e-05
Right anterior cingulate cortex	17855	10	44	8	4.48	5.7e-06
Left inferior frontal gyrus		−46	38	8	6.59	1.3e-10
Right middle frontal gyrus		48	34	24	10.5	6.0e-22
Left superior frontal gyrus		−22	−2	58	4.97	6.4e-07
Right thalamus		8	−22	6	4.49	5.6e-06
Right superior parietal lobe		2	−70	38	6.22	1.1e-09
Regions significantly more active for psychosis risk than the comparison group
Right inferior temporal gyrus	196	66	−42	−16	6.84	3.1e-11
Right anterior intraparietal sulcus	191	26	−50	38	6.39	4.2e-10
Right visual cortex (V4)	757	32	−78	−18	9.72	2.1e-19
Left visual cortex (V4)	316	−30	−86	−14	5.78	1.1e-08

Note: Analyses were also run with a cluster threshold of Z = 4.30, P > .01 FWE-corrected. For the analyses of regions significantly more active for the comparison group than psychosis risk, the results were largely similar, except that the hippocampus was no longer significantly activated. For the analyses of regions significantly more active for psychosis risk than the comparison group, there were no clusters of significant activation.