Confidence in value-based choice.

Confidence in value-based choice.
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DOI:
10.1038/nn.3279
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发表时间:
2013-01
影响因子:
25
通讯作者:
Dolan, Raymond J.
Dolan, Raymond J.
中科院分区:
医学1区
文献类型:
--
作者:
De Martino, Benedetto;Fleming, Stephen M.;Garrett, Neil;Dolan, Raymond J.

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随着时间的推移,一个人对自己选择的信心也在波动,所以决定从来都不是完美的。主观信心和选择的价值如何在大脑和行为的层面上相互作用是未知的。利用决策过程的动态模型,我们表明信心反映了决策变量随时间的演变,解释了观察到的信心、价值、准确性和反应时间之间的关系。正如我们的动态模型所预测的那样,我们发现人类腹内侧前额叶皮层(vmPFC)的fMRI信号反映了值比较过程中的值比较和置信度。至关重要的是,个体在如何将信心与准确性联系起来方面存在差异,这使我们能够证明,这种内省能力是通过测量vmPFC和rostrolateral prefrontal cortex (rlPFC)之间的功能连接来预测的。我们的发现提供了价值比较中的噪音和选择的元认知意识之间的机制联系,使我们既想要也表达我们想要的知识。
Decisions are never perfect with confidence in one’s choices fluctuating over time. How subjective confidence and valuation of choice options interact at the level of brain and behavior is unknown. Using a dynamic model of the decision process we show that confidence reflects the evolution of a decision variable over time, explaining the observed relation between confidence, value, accuracy and reaction time. As predicted by our dynamic model, we show that an fMRI signal in human ventromedial prefrontal cortex (vmPFC) reflects both value comparison and confidence in the value comparison process. Crucially, individuals varied in how they related confidence to accuracy, allowing us to show that this introspective ability is predicted by a measure of functional connectivity between vmPFC and rostrolateral prefrontal cortex (rlPFC). Our findings provide a mechanistic link between noise in value comparison and metacognitive awareness of choice, enabling us both to want and to express knowledge of what we want.
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