Visual Awareness in Binocular Rivalry Modulates Induced Pupil Fluctuations.

ABSTRACT: When a visual stimulus oscillates in luminance, pupil size follows this oscillation. Recently, it has been demonstrated that such induced pupil oscillations can be used to tag which stimulus is covertly attended. Here we ask whether this "pupil frequency tagging" approach can be extended to visual awareness, specifically to inferring perceptual dominance in Binocular Rivalry between complex stimuli. We presented two distinct stimuli, a face and a house, to each eye and modulated their luminance at 1.7 Hz either in counter-phase (180° phase shift), with a 90° phase shift or in phase (0° control). In some conditions, we additionally asked observers to attend either of the stimuli. The luminance modulation was sufficiently subtle that rivalry dynamics did not differ among these conditions, an

SUBMITTER: Schutz I 

PROVIDER: S-EPMC6634329 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature