Figure 4
Effect of coupling strength between interacting channels \(X_1\) and \(X_2\) on the method chosen to detect quadratic phase coupling. The curves are centered on the medians of each group. The violin plots show the kernel probability density of the data at different values. (A) Ratio of bispectral quadratic phase coupling (\(R_\mathrm{BQPC}\)) as a function of the coupling strength \(W_{(1,2)}\) between \(X_1\) and \(X_2\). (B) Ratio of bivariate Granger causality Quadratic Phase Coupling (\(R_\mathrm{GQPC}\)) as a function of the coupling strength. For graphical purpose the overlay of points has been limited by adding a random horizontal jitter equal to 0.05.
