文章基本信息

标题：Economic choices can be made using only stimulus values
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作者：Klaus Wunderlich ; Antonio Rangel ; John P. O'Doherty 等
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2010
卷号：107
期号：34
页码：15005-15010
DOI：10.1073/pnas.1002258107
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Decision-making often involves choices between different stimuli, each of which is associated with a different physical action. A growing consensus suggests that the brain makes such decisions by assigning a value to each available option and then comparing them to make a choice. An open question in decision neuroscience is whether the brain computes these choices by comparing the values of stimuli directly in goods space or instead by first assigning values to the associated actions and then making a choice over actions. We used a functional MRI paradigm in which human subjects made choices between different stimuli with and without knowledge of the actions required to obtain the different stimuli. We found neural correlates of the value of the chosen stimulus (a postdecision signal) in ventromedial prefrontal cortex before the actual stimulus-action pairing was revealed. These findings provide support for the hypothesis that the brain is capable of making choices in the space of goods without first transferring values into action space.
关键词：decision-making ; functional MRI ; goods space ; reinforcement learning ; ventromedial prefrontal cortex