Figure 2.

Plots showing differences between the schizophrenic patients and the controls in terms of relatively simple, non-graph-theoretical properties of their MRI time series. (A) The variability in the scale 2 (0.05–0.111 Hz) global MR signal is higher in the controls than in the COS population. (B) The difference in the variability of the global MR signal is illustrated with the time series from the median subjects of each population. The green line shows the boundary between the successive scans, whose wavelet coefficients were concatenated. (C) There is a trend toward greater variability in the MR signal of anatomical regions, in the control population relative to the COS population. (D) The difference in the variability of the regional MR signals is illustrated with the time series from the median subjects of each population for one of the regions that shows a difference, the left insula. (E) Regional strength, the average wavelet correlation between each region and every other region, is decreased in the COS population. (F) Kendall's coefficient of concordance (W), a measure of the homogeneity of the signal within each anatomical region, is decreased in the COS population. Error bars are standard mean error, and asterisks signify p < 0.05 uncorrected p-value from a t-test.