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, e11946-
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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.
Type of material:Journal Article
Availability:Full text available
Keywords:EEG, decision-making, diffusion model, error detection, human, metacognition, neuroscience