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对人类强化学习有偏见的信心的神经和计算基础
Chih-Chung Ting1,2, Nahuel Salem-Garcia3, Stefano Palminteri4,5
1General Psychology, Universität Hamburg, Von-Melle-Park 11, 20146, Hamburg, Germany. chihchung.ting@uni-hamburg.de.
Nature communications
|October 29, 2023
概括
人类评估决策正确性,与前额叶皮层活动相关的信心. 这项研究揭示了腹中前额叶皮层 (VMPFC) 整合了信心信号,挑战了目前的神经计算模型.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 计算神经科学是一种神经科学.
背景情况:
- 人类和动物在不确定的环境中评估决策正确性.
- 信任度估计与特定的前额叶皮层网络活动相关.
研究的目的:
- 为了研究在强化学习过程中信任信号的神经基础.
- 探索前额叶皮层 (VMPFC) 在信心估计中的作用.
- 在决策中区分信任信号和选项值.
主要方法:
- 功能性磁共振成像 (fMRI) 与强化学习模式相结合.
- 利用寻求收益与避免损失的信心偏见.
- 分析神经活动与信心和推断的选择值有关.
主要成果:
- 在背部和VMPFC网络之间观察到对信任信号的功能解离.
- 该VMPFC积极编码一个全任务的信任信号,包括价值诱导偏差.
- VMPFC活动与信心的相关性更强,而不是强化学习推断的选项值.
结论:
- VMPFC是产生全球信心信号的关键神经节点.
- 这个过程在强化学习过程中整合了潜在的决策变量与上下文偏差.
- 这些发现挑战了现有的神经计算模型的信心和决策.
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