1. Early cross-modal interactions underlie the audiovisual bounce-inducing effect.
- Author
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Zhao, Song, Wang, Yajie, Xu, Hongyuan, Feng, Chengzhi, and Feng, Wenfeng
- Subjects
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EVOKED potentials (Electrophysiology) , *STIMULUS & response (Biology) , *BRAIN waves , *CLINICAL trials , *SOUND recordings - Abstract
Two identical visual disks moving towards one another on a two-dimensional display can be perceived as either “streaming through” or “bouncing off” each other after their coincidence/overlapping. A brief sound presented at the moment of the coincidence of the disks could strikingly bias the percept towards bouncing, which was termed the audiovisual bounce-inducing effect (ABE). Although the ABE has been studied intensively since its discovery, the debate about its origin is still unresolved so far. The present study used event-related potential (ERP) recordings to investigate whether or not early neural activities associated with cross-modal interactions play a role on the ABE. The results showed that the fronto-central P2 component ∼200 ms before the coincidence of the disks was predictive of subsequent streaming or bouncing percept in the unimodal visual display but not in auditory-visual display. More importantly, the cross-modal interactions revealed by the fronto-central positivity PD170 (125–175 ms after sound onset), as well as the occipital positivity PD190 (180–200 ms), were substantially enhanced on bouncing trials compared to streaming trials in the auditory-visual display. These findings provide direct electrophysiological evidence that early cross-modal interactions contribute to the origin of ABE phenomenon at the perceptual stage of processing. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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