TY - JOUR TI - Neural evidence accumulation persists after choice to inform metacognitive judgments AU - Murphy, Peter R AU - Robertson, Ian H AU - Harty, Siobhán AU - O'Connell, Redmond G A2 - Frank, Michael J VL - 4 PY - 2015 DA - 2015/12/19 SP - e11946 C1 - eLife 2015;4:e11946 DO - 10.7554/eLife.11946 UR - https://doi.org/10.7554/eLife.11946 AB - 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. KW - metacognition KW - error detection KW - decision-making KW - diffusion model KW - EEG JF - eLife SN - 2050-084X PB - eLife Sciences Publications, Ltd ER -