Fig. 2.

Consistency of network matrix estimation. (A) Stability of group-level inference. Correlations between network matrices inferred from separate halves of the HCP dataset, using resting-state recordings in the alpha band. The dataset was randomly partitioned in half 100 times, and the distribution of correlations between the network edge strengths in each half was produced over the bootstrapped samples. (B) Within-subject consistency of network inference. Correlations between alpha-band network matrices inferred from each of three resting-state sessions from 61 subjects of the HCP dataset. (C) Between-subject consistency of network inference. Correlations between alpha-band network matrices inferred from 61 subjects of the HCP dataset. In all cases, the violin plots show smoothed histograms of these distributions, the median marked by a white cross. Correlations have been converted to Z-values using Fisher's transformation, but labelled with the original rho value, for clearer display. Darker distributions with background shading identify metrics which are known to suffer from source-leakage confounds. Metrics with a star indicate that a multivariate source leakage correction has been applied before computation of the network measure. AEC - amplitude envelope correlation; PAEC - partial amplitude envelope partial correlation; PLI - phase lag index; wPLI - weighted phase lag index; PLV - phase locking value; PSI - phase slope index; MI - mutual information of phases. Coh - band-averaged coherence; IMC - band-averaged imaginary component of coherency; PCoh - partial coherence; IMPC - partial imaginary coherence; PDC - partial directed coherence.