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首页> 外文期刊>The Journal of Neuroscience: The Official Journal of the Society for Neuroscience >Parietal cortex and insula relate to evidence seeking relevant to reward-related decisions.
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Parietal cortex and insula relate to evidence seeking relevant to reward-related decisions.

机译：顶叶皮层和绝缘体与寻求与奖励相关的决定有关的证据有关。

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Decisions are most effective after collecting sufficient evidence to accurately predict rewarding outcomes. We investigated whether human participants optimally seek evidence and we characterized the brain areas associated with their evidence seeking. Participants viewed sequences of bead colors drawn from hidden urns and attempted to infer the majority bead color in each urn. When viewing each bead color, participants chose either to seek more evidence about the urn by drawing another bead (draw choices) or to infer the urn contents (urn choices). We then compared their evidence seeking against that predicted by a Bayesian ideal observer model. By this standard, participants sampled less evidence than optimal. Also, when faced with urns that had bead color splits closer to chance (60/40 versus 80/20) or potential monetary losses, participants increased their evidence seeking, but they showed less increase than predicted by the ideal observer model. Functional magnetic resonance imaging showed that urn choices evoked larger hemodynamic responses than draw choices in the insula, striatum, anterior cingulate, and parietal cortex. These parietal responses were greater for participants who sought more evidence on average and for participants who increased more their evidence seeking when draws came from 60/40 urns. The parietal cortex and insula were associated with potential monetary loss. Insula responses also showed modulation with estimates of the expected gains of urn choices. Our findings show that participants sought less evidence than predicted by an ideal observer model and their evidence-seeking behavior may relate to responses in the insula and parietal cortex.
机译：收集足够的证据以准确预测可喜的结果后，决策才最有效。我们调查了人类参与者是否以最佳方式寻求证据，并确定了与他们寻求证据相关的大脑区域。参与者查看了从隐藏的中提取的珠子颜色的序列，并尝试推断每个子中的多数珠子颜色。当查看每种珠子的颜色时，参与者选择要么通过绘制另一个珠子来寻找更多关于evidence的证据（绘制选择），要么推断in的含量（ur选择）。然后，我们将他们寻求的证据与贝叶斯理想观察者模型所预测的证据进行了比较。按照该标准，参与者抽样的证据少于最佳证据。此外，当面对色泽更接近机会（60/40对80/20）或潜在金钱损失的ur时，参与者增加了寻求证据的能力，但增加的幅度少于理想观察者模型的预测。功能磁共振成像显示，与在岛状，纹状体，前扣带回和顶叶皮层中进行选择相比，的选择引起更大的血液动力学反应。对于平均寻求更多证据的参与者和寻求更多证据的参与者，当壁画来自60/40骨灰盒时，这些壁垒反应更大。顶叶皮质和绝缘与潜在的金钱损失有关。绝缘反应也显示出调制，并估计了选择的预期收益。我们的发现表明，参与者寻求的证据少于理想观察者模型所预测的证据，并且他们寻求证据的行为可能与岛突和顶叶皮层的反应有关。

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