A neural basis for interindividual differences in the McGurk effect, a multisensory speech illusion

► The McGurk effect is an audiovisual speech illusion that only some humans perceive. ► Left superior temporal sulcus (STS) is important for audiovisual speech perception. ► McGurk perceivers exhibit stronger STS activity for incongruent audiovisual speech. ► Left STS was the only brain area that differed between groups and stimuli. ► Left STS activity may be the neural basis for intersubject McGurk differences.