Figure 5. Results of follow-up behavioral experiment.

In a behavioral experiment conducted outside the scanner, participants were asked to perceive and overtly repeat four-syllable sequences presented in three modalities – auditory (A), visual (V) and audiovisual (AV). Performance was quantified with three separate measures: number of syllables correctly repeated per trial in the correct position of the sequence, number of syllables correctly repeated per trial regardless of position, and total number of utterances per trial completed within three seconds of the onset of the response period. Means across participants are presented for each performance measure in the left, middle, and right panels, respectively. Error bars reflect ±1 SEM.