FIG. 6.

(A) Two sample t-tests of group differences in correlations with a seed in the default mode network (Binder et al., 1999; Greicius et al., 2003). The two groups were formed from the Cambridge_Buckner portion of the FCON1000 dataset by splitting an otherwise homogenous group into the upper and lower 50% of movers. Time points of resting state EPI data with per-TR motion exceeding 0.2 mm were censored. Column β₁ Base shows results from Level-II Base, where preprocessing included the six motion estimates and their derivatives. In column β₁ GSReg, the global signal was added as a nuisance regressor in preprocessing. Column β₁ GCOR is from data preprocessed the same way as for β₁ Base, but the per-subject brain-wide average correlation (global correlation; GCOR) was used as a scalar covariate for the group analysis. Group differences were thresholded at an FWE-corrected significance level of 0.05. For each column only the largest 4 clusters are displayed. (B) Results from the Beijing_Zang set of FCON1000 data paralleling those of A. (C) Scatter plots of subject average motion versus GCOR. Blue and red dots show values from subjects in the bottom and top moving groups, respectively. For each group, vertical bars show the average amount of motion and horizontal bars show the average GCOR.