Kayser, S. J. and Kayser, C. (2018) Trial by trial dependencies in multisensory perception and their correlates in dynamic brain activity. Scientific Reports, 8, 3742. (doi: 10.1038/s41598-018-22137-8) (PMID:29487374) (PMCID:PMC5829215)
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Abstract
A well-known effect in multisensory perception is that congruent information received by different senses usually leads to faster and more accurate responses. Less well understood are trial-by-trial interactions, whereby the multisensory composition of stimuli experienced during previous trials shapes performance during a subsequent trial. We here exploit the analogy of multisensory paradigms with classical flanker tasks to investigate the neural correlates underlying trial-by-trial interactions of multisensory congruency. Studying an audio-visual motion task, we demonstrate that congruency benefits for accuracy and reaction times are reduced following an audio-visual incongruent compared to a congruent preceding trial. Using single trial analysis of motion-sensitive EEG components we then localize current-trial and serial interaction effects within distinct brain regions: while the multisensory congruency experienced during the current trial influences the encoding of task-relevant information in sensory-specific brain regions, the serial interaction arises from task-relevant processes within the inferior frontal lobe. These results highlight parallels between multisensory paradigms and classical flanker tasks and demonstrate a role of amodal association cortices in shaping perception based on the history of multisensory congruency.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Kayser, Dr Stephanie and Kayser, Professor Christoph |
| Authors: | Kayser, S. J., and Kayser, C. |
| College/School: | College of Medical Veterinary and Life Sciences > School of Psychology & Neuroscience |
| Journal Name: | Scientific Reports |
| Publisher: | Nature Publishing Group |
| ISSN: | 2045-2322 |
| ISSN (Online): | 2045-2322 |
| Copyright Holders: | Copyright © 2018 The Authors |
| First Published: | First published in Scientific Reports 8: 3742 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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