Fig. 2.

a–f McGurk frequency differences across participants. a Each symbol shows a single participant, in increasing order by how frequently they perceived the McGurk effect. Participants were classified as strong (frequency > = 50 %; green symbols) or weak (red symbols) perceivers of the effect. b Average eye movement behavior of strong perceivers (illustrated by green outline around still frame of video). Color scale shows percentage of time spent fixating each location. c Average eye movement behavior of weak perceivers (red frame). d Still frame of video with black outlines showing the location of three regions-of-interest (ROIs) used for eye movement analysis (left eye, right eye, mouth). e The percentage of total stimulus duration spent fixating the mouth ROI (mouth looking time) for weak and strong perceivers. Error bars Standard error of the mean. f The percentage of total stimulus duration spent fixating the eye ROIs