The EEG signature of sensory evidence accumulation during decision formation closely tracks subjective perceptual experience.

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 th

SUBMITTER: Tagliabue CF 

PROVIDER: S-EPMC6426990 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature