Fig. 4.

The results of a whole-brain analysis examining where in the brain showed altered functional connectivity with the DLPFC during confidence rating as a function of spatial frequency, response type, and group. Here, the degree of functional connectivity was estimated with a general form of context-dependent psychophysiological interaction (gPPI) (McLaren et al., 2012). The functional connectivity between the DLPFC and bilateral clusters in parietal and visual cortices were significantly modulated as a function of the interaction between spatial frequency, response type, and group (p < .01, corrected with cluster-size thresholding (Forman et al., 1995, Goebel et al., 2006)). Here, DLPFC ROIs were functionally defined from a group GLM. ROIs include the voxels that showed significantly larger activity during the confidence rating period relative to fixation in a group GLM (p < .01, Bonferroni corrected). a: anterior, r: right.