Notable methodological advancements have come from the evolution of multi-brain imaging techniques beyond fMRI, especially magnetoencephalography/electroencephalography (MEG/EEG) and functional near-infrared spectroscopy (fNIRS)—methods which afford more socially interactive experimental designs.[1][11] These technologies are also complemented by comprehensive data processing techniques that are useful in multi-brain analyses,[12][13] such as Granger causality[14] or Phase Locking Value (PLV).[15]