Neural evidence accumulation persists after choice to inform metacognitive judgments.
Item Type:Journal Article
Citation:Murphy PR, Robertson IH, Harty S, O'Connell RG, Neural evidence accumulation persists after choice to inform metacognitive judgments., eLife, 4, 2015
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The ability to revise one's certainty or confidence in a preceding choice is a critical feature of adaptive decision-making but the neural mechanisms underpinning this metacognitive process have yet to be characterized. In the present study, we demonstrate that the same build-to-threshold decision variable signal that triggers an initial choice continues to evolve after commitment, and determines the timing and accuracy of self-initiated error detection reports by selectively representing accumulated evidence that the preceding choice was incorrect. We also show that a peri-choice signal generated in medial frontal cortex provides a source of input to this post-decision accumulation process, indicating that metacognitive judgments are not solely based on the accumulation of feedforward sensory evidence. These findings impart novel insights into the generative mechanisms of metacognition.
Author: ROBERTSON, IAN
Type of material:Journal Article
Availability:Full text available
Keywords:EEG, decision-making, diffusion model, error detection, human, metacognition, neuroscience