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Separable neural signatures of confidence during perceptual decisions

View ORCID ProfileT. Balsdon, View ORCID ProfileP. Mamassian, View ORCID ProfileV. Wyart
doi: https://doi.org/10.1101/2021.04.08.439033
T. Balsdon
1Laboratoire des Systèmes Perceptifs (CNRS UMR 8248), DEC, ENS, PSL University, 75005 Paris, France
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  • For correspondence: tarryn.balsdon@gmail.com
P. Mamassian
1Laboratoire des Systèmes Perceptifs (CNRS UMR 8248), DEC, ENS, PSL University, 75005 Paris, France
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V. Wyart
2Laboratoire de Neurosciences Cognitives et Computationelles (Inserm U960), DEC, ENS, PSL University, 75005, Paris, France
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Abstract

Perceptual confidence is an evaluation of the validity of perceptual decisions. While there is behavioural evidence that confidence evaluation differs from perceptual decision-making, disentangling these two processes remains a challenge at the neural level. Here we examined the electrical brain activity of human participants in a protracted perceptual decision-making task where observers tend to commit to perceptual decisions early whilst continuing to monitor sensory evidence for evaluating confidence. Premature decision commitments were revealed by patterns of spectral power overlying motor cortex, followed by an attenuation of the neural representation of perceptual decision evidence. A distinct neural representation was associated with suboptimalities affecting confidence reports, with sources localised in the superior parietal and orbitofrontal cortices. In agreement with a dissociation between perception and confidence, these neural resources were recruited even after observers committed to their perceptual decisions, and thus delineate an integral neural circuit for the computation of confidence.

Competing Interest Statement

The authors have declared no competing interest.

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY 4.0 International license.
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Posted April 10, 2021.
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Separable neural signatures of confidence during perceptual decisions
T. Balsdon, P. Mamassian, V. Wyart
bioRxiv 2021.04.08.439033; doi: https://doi.org/10.1101/2021.04.08.439033
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Separable neural signatures of confidence during perceptual decisions
T. Balsdon, P. Mamassian, V. Wyart
bioRxiv 2021.04.08.439033; doi: https://doi.org/10.1101/2021.04.08.439033

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