Tagliabue, C. F., Veniero, D., Benwell, C. S.Y., Cecere, R., Savazzi, S. and Thut, G. (2019) The EEG signature of sensory evidence accumulation during decision formation closely tracks subjective perceptual experience. Scientific Reports, 9, 4949. (doi: 10.1038/s41598-019-41024-4) (PMID:30894558) (PMCID:PMC6426990)
|
Text
180839.pdf - Published Version Available under License Creative Commons Attribution. 4MB |
Abstract
How neural representations of low-level visual information are accessed by higher-order processes to inform decisions and give rise to conscious experience is a longstanding question. Research on perceptual decision making has revealed a late event-related EEG potential (the Centro-Parietal Positivity, CPP) to be a correlate of the accumulation of sensory evidence. We tested how this evidence accumulation signal relates to externally presented (physical) and internally experienced (subjective) sensory evidence. Our results show that the known relationship between the physical strength of the external evidence and the evidence accumulation signal (reflected in the CPP amplitude) is mediated by the level of subjective experience of stimulus strength. This shows that the CPP closely tracks the subjective perceptual evidence, over and above the physically presented evidence. We conclude that a remarkably close relationship exists between the evidence accumulation process (i.e. CPP) and subjective perceptual experience, suggesting that neural decision processes and components of conscious experience are tightly linked.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Benwell, Mr Christopher and Tagliabue, Chiara Francesc and Thut, Professor Gregor and Cecere, Dr Roberto and Veniero, Dr Domenica |
| Authors: | Tagliabue, C. F., Veniero, D., Benwell, C. S.Y., Cecere, R., Savazzi, S., and Thut, G. |
| College/School: | College of Medical Veterinary and Life Sciences > School of Psychology & Neuroscience |
| Journal Name: | Scientific Reports |
| Publisher: | Nature Research |
| ISSN: | 2045-2322 |
| ISSN (Online): | 2045-2322 |
| Copyright Holders: | Copyright © 2019 The Authors |
| First Published: | First published in Scientific Reports 9: 4949 |
| Publisher Policy: | Reproduced under a Creative Commons License |
University Staff: Request a correction | Enlighten Editors: Update this record
Funder and Project Information
Funder and Project Information