Figure 10.

Results of group gPPI effect seeded in right cuneus (flickering checkerboards vs resting baseline) for Data set 1, NC preprocessing variant, for different filtering strategies—(a) without filtering of CSF/WM signals, (b) winning variant (1 + 1 PCA components from CSF mask of group‐specific ventricular system and WM general template), (c) equivalent variant (1 + 1 PCA components from group‐specific CSF mask of whole CSF compartment and group‐specific WM mask), (d) 1 + 1 PCA components from strict masks (group‐specific mask of lateral ventricles and group‐specific WM mask), (e) 5 + 5 PCA components from strict masks (same as in (d)), (f) 5 + 5 PCA components from “large” masks (group‐specific CSF mask of whole CSF compartment and general WM template). Nineteen subjects were involved in the analysis, and gender was added into the group model as a covariate of no interest. Maps are thresholded at p < .005 uncorrected for multiple comparisons. Red and blue bars with corresponding numbers indicate the numbers of significant voxels with positive and negative effects respectively [Color figure can be viewed at http://wileyonlinelibrary.com]