“…One group of such studies has employed pseudo-interactive scenarios, scanning one person at a time in unidirectional interactions (Schippers et al, 2010, Stephens et al, 2010, Anders et al, 2011, Kuhlen et al, 2012, while others have measured two-brain processes during either turn-based or continuous, mutual interactions, employing fMRI (e.g. Montague et al, 2002, KingCasas et al, 2005, Saito et al, 2010, EEG (e.g. Lindenberger et al, 2009, Dumas et al, 2010, Dodel et al, 2011, Yun et al, 2012, or fNIRS (e.g.…”