Supplementary Eye Field Encodes Confidence in Decisions Under Risk.
Supplementary Eye Field Encodes Confidence in Decisions Under Risk.
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补充视野增强了对风险决策的信心。
DOI：
10.1093/cercor/bhv025
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Stuphorn,Veit
中科院分区：
文献类型：
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作者：
So,NaYoung;Stuphorn,Veit
做出选择时会有不同程度的自信，这是一种认知信号，代表着对选择的最佳性的主观信念。信心主要是在感知判断的背景下进行研究的，在这种判断中，选择的准确性可以使用客观标准来衡量。在这里，我们研究基于主观价值的决策中的信心。我们记录了执行赌博任务的猴子的补充眼野(SEF)，在那里它们必须使用主观标准下注。我们在SEF中发现了独立于奖励期望的神经信号，它明确地代表了选择的信心。这种信心信号出现在选择之后，并在选择结果之前减弱。大多数这种神经元活动与信心呈负相关，在猴子自发撤回选择的试验中表现最强。这种与信心相关的活动表明，SEF不仅指导眼跳选择，还评估选择是最佳的可能性。这一内部评估影响了有关是否愿意承担选择后的费用或避免这些费用的决定。更广泛地说，我们的发现表明，选择信心是所有形式的决策的一个组成部分，无论它们是基于感知证据还是基于价值估计。
Choices are made with varying degrees of confidence, a cognitive signal representing the subjective belief in the optimality of the choice. Confidence has been mostly studied in the context of perceptual judgments, in which choice accuracy can be measured using objective criteria. Here, we study confidence in subjective value-based decisions. We recorded in the supplementary eye field (SEF) of monkeys performing a gambling task, where they had to use subjective criteria for placing bets. We found neural signals in the SEF that explicitly represent choice confidence independent from reward expectation. This confidence signal appeared after the choice and diminished before the choice outcome. Most of this neuronal activity was negatively correlated with confidence, and was strongest in trials on which the monkey spontaneously withdrew his choice. Such confidence-related activity indicates that the SEF not only guides saccade selection, but also evaluates the likelihood that the choice was optimal. This internal evaluation influences decisions concerning the willingness to bear later costs that follow from the choice or to avoid them. More generally, our findings indicate that choice confidence is an integral component of all forms of decision-making, whether they are based on perceptual evidence or on value estimations.