前额叶腹内侧皮质
心理学
元认知
感知
认知心理学
刺激(心理学)
前额叶皮质
脑电图
低信心
认知
多元统计
置信区间
神经科学
发展心理学
社会心理学
计算机科学
统计
机器学习
数学
作者
Sabina Gherman,Marios G. Philiastides
出处
期刊:eLife
[eLife Sciences Publications, Ltd.]
日期:2018-09-24
卷期号:7
被引量:53
摘要
Choice confidence, an individual’s internal estimate of judgment accuracy, plays a critical role in adaptive behaviour, yet its neural representations during decision formation remain underexplored. Here, we recorded simultaneous EEG-fMRI while participants performed a direction discrimination task and rated their confidence on each trial. Using multivariate single-trial discriminant analysis of the EEG, we identified a stimulus-independent component encoding confidence, which appeared prior to subjects’ explicit choice and confidence report, and was consistent with a confidence measure predicted by an accumulation-to-bound model of decision-making. Importantly, trial-to-trial variability in this electrophysiologically-derived confidence signal was uniquely associated with fMRI responses in the ventromedial prefrontal cortex (VMPFC), a region not typically associated with confidence for perceptual decisions. Furthermore, activity in the VMPFC was functionally coupled with regions of the frontal cortex linked to perceptual decision-making and metacognition. Our results suggest that the VMPFC holds an early confidence representation arising from decision dynamics, preceding and potentially informing metacognitive evaluation.
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