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Participants smile more when winning, and frown more when losing, when the android conveys the outcome of the game. Panel (A) presents z-scored EMG activity in the zygomaticus muscle and panel (B) presents z-scored EMG activity in the corrugator muscle. Both present activity across the length of the trial, or during the 2nd half of the trial, where emotion-driven differences were expected to occur. Error bars represent the standard error of the subject means.
