Figure 4.
Results obtained for the phase-shuffled BOLD time series. (a) Complementary cumulative distribution functions (CCDFs) for cluster sizes obtained using the surrogate time series. The dashed lines indicate the exponent of the best fit using power laws with exponential cut-off. The cut-off parameters β were, on average, 109 larger than for the unshuffled data. (b) Means and standard errors of α values for each level of granularity. Note that there are no significant differences between stages, and that the α values change significantly as a consequence of coarse graining. (Online version in colour.)