Poster A28, Saturday, March 25, 5:00 – 7:00 pm, Pacific Concourse
A dual piano performance EEG study: the effect of the partner’s animacy and melodic content on alpha-band oscillations
Iran Roman1, Madeline Huberth1, Nick Gang1, Tysen Dauer1, Wisam Reid1, Chryssie Nanou1, Matthew Wright1, Takako Fujioka1; 1Stanford University
In musical ensembles players perform different roles, such as leader or followers, thus ensuring coordinated actions. Social interaction research demonstrates systematic communication between leaders and followers with behavioral and electrophysiological measures. Alpha-band oscillations are typically associated with visual processing and movement. Previous reports have found that frontal alpha oscillations desynchronize differently among leaders and followers in joint finger tapping tasks. Furthermore, hearing one’s own name leads to larger alpha desynchronization compared to hearing other names. In this study we asked: Will alpha-band activity be systematically affected by whether one’s partner in a piano duet is a real human or a computer, or by whether the partner plays the same or a different melodic motif? We recorded EEG from four pairs of subjects playing two versions of a piano duet, both sharing an identical ending but with different preceding content. In version 1, the content preceding the ending consisted of both players performing the same motif alternatingly (A1, A2, A1, A2), whereas in version 2 there were two different motifs, one assigned to each player (B1, C2, B1, C2). The ending phrase required the leader to play three notes alone before the follower joined in unison. Before the start of unison playing, the leader showed a larger alpha-band desynchronization playing with the computer partner compared to the human partner, but only when the preceding motifs were shared. This suggests that a leader playing the same melody with a computer internalizes the computer’s actions as if they were self actions.
Topic Area: EMOTION & SOCIAL: Self perception