Medial frontal cortex activity predicts information sampling in economic choice
Medial frontal cortex activity predicts information sampling in economic choice
复制标题
内侧额叶皮层活动预测经济选择中的信息采样
DOI：
10.1101/2020.11.24.395814
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Kaanders P
中科院分区：
文献类型：
--
作者：
Kaanders P
决策不仅要求代理人决定选择什么，而且还要求代理人在做出选择之前选择多少信息。以前建立的经济选择框架主张一个经过时间的证据积累的审慎过程。这些都默认了信息采样的作用，即只有在获得足够的证据后才能做出决定，但很少有实验明确地将信息采样置于参与者的控制之下。在这里，我们使用功能磁共振成像调查的神经基础上的信息采样在经济选择，让参与者（n= 30，性别不记录），积极采样信息的多步决策任务。我们发现，内侧额叶皮层（MFC）的活动是预测选择前进一步的信息采样。MFC中还对选择难度（逆值差，保持感官难度恒定）进行了编码，但这种效应可以通过在一般线性模型中包含作为核回归器的信息采样来解释。前额叶皮层上的一个分布式区域网络在信息呈现时对采样信息的关键特征进行编码。我们建议，MFC是一个重要的控制器的程度，信息收集之前，承诺的经济选择。这个角色可以解释为什么MFC活动一直与证据积累在以前的研究中，信息采样是一个隐含的，而不是明确的功能decision.SignificanceStatementThe决定，我们所做的决定是由我们所承诺的选择之前采样的信息。决策的累积框架默认需要在证据累积过程中进一步采样信息，直到达到决策边界。然而，相对较少的研究明确地将这种决定置于参与者的控制之下，以进一步收集信息。在这个fMRI研究中，我们发现MFC活动与多步经济选择任务中的信息抽样决策有关。这表明MFC中证据表示的重要作用可能是指导自适应顺序决策，以便在做出最终决策之前对更多信息进行采样。
Decision-making not only requires agents to decide what to choose but also how much information to sample before committing to a choice. Previously established frameworks for economic choice argue for a deliberative process of evidence accumulation across time. These tacitly acknowledge a role of information sampling in that decisions are only made once sufficient evidence is acquired, yet few experiments have explicitly placed information sampling under the participant's control. Here, we use fMRI to investigate the neural basis of information sampling in economic choice by allowing participants (n= 30, sex not recorded) to actively sample information in a multistep decision task. We show that medial frontal cortex (MFC) activity is predictive of further information sampling before choice. Choice difficulty (inverse value difference, keeping sensory difficulty constant) was also encoded in MFC, but this effect was explained away by the inclusion of information sampling as a coregressor in the general linear model. A distributed network of regions across the prefrontal cortex encoded key features of the sampled information at the time it was presented. We propose that MFC is an important controller of the extent to which information is gathered before committing to an economic choice. This role may explain why MFC activity has been associated with evidence accumulation in previous studies in which information sampling was an implicit rather than explicit feature of the decision.SIGNIFICANCE STATEMENTThe decisions we make are determined by the information we have sampled before committing to a choice. Accumulator frameworks of decision-making tacitly acknowledge the need to sample further information during the evidence accumulation process until a decision boundary is reached. However, relatively few studies explicitly place this decision to sample further information under the participant's control. In this fMRI study, we find that MFC activity is related to information sampling decisions in a multistep economic choice task. This suggests that an important role of evidence representations within MFC may be to guide adaptive sequential decisions to sample further information before committing to a final decision.
登录
查看更多内容
竞选活动作为信息活动：谁学到什么以及这重要吗？
影响因子：
7.5
作者：
R. Nadeau;N. Nevitte;E. Gidengil;A. Blais
通讯作者：
A. Blais
影响因子：
5.4
作者：
M. Usher;James L. McClelland
通讯作者：
M. Usher;James L. McClelland
DOI：
10.1073/pnas.0912838107
发表时间：
2010-03-30
影响因子：
11.1
作者：
Kahnt, Thorsten;Heinzle, Jakob;Haynes, John-Dylan
通讯作者：
Haynes, John-Dylan
影响因子：
2.1
作者：
Kerstin Gidlöf;A. Wallin;Richard J. Dewhurst;K. Holmqvist
通讯作者：
Kerstin Gidlöf;A. Wallin;Richard J. Dewhurst;K. Holmqvist
影响因子：
56.9
作者：
Domenech, Philippe;Rheims, Sylvain;Koechlin, Etienne
通讯作者：
Koechlin, Etienne