“…The first EEG hyperscanning study was reported by Babiloni et al ( 2006 ) and involved sets of four individuals playing Tressette, a bridge-like game. Since then, there have been 30 more EEG publications that meet the definition of hyperscanning coming from more than 20 independent studies have claimed increased neural coupling between people engaged in social interaction (Babiloni et al, 2006 , 2007a , b , 2011 , 2012 ; Flexer and Makeig, 2007 ; Tognoli et al, 2007 , 2011a , b ; Chung et al, 2008 ; Tognoli, 2008 ; Yun et al, 2008 ; Astolfi et al, 2009 , 2010a , b , c , 2011a , b , 2012 ; Lindenberger et al, 2009 ; Dumas et al, 2010 , 2012a , b ; Fallani et al, 2010 ; Dodel et al, 2011 ; Lachat et al, 2012 ; Naeem et al, 2012a , b ; Sanger et al, 2012 , 2013 ; Yun et al, 2012 ; Kawasaki et al, 2013 ). The methods used to establish neural coupling between people have been very consistent and nearly all studies have used one of three methods: (i) covariance in amplitude or power, (ii) Partial Directed Coherence (PDC); (Baccala and Sameshima, 2001 ), and (iii) phase synchrony, mostly the Phase-Locking Value (PLV) (Lachaux et al, 1999 ) or a variant thereof.…”