...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Neurobiology of learning and memory >Evaluation of the hypothesis that phasic dopamine constitutes a cached-value signal
【24h】

Evaluation of the hypothesis that phasic dopamine constitutes a cached-value signal

机译：评估阶段多巴胺构成缓存值信号的假设

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The phasic dopamine error signal is currently argued to be synonymous with the prediction error in Sutton and Barto (1987, 1998) model-free reinforcement learning algorithm (Schultz et al., 1997). This theory argues that phasic dopamine reflects a cached-value signal that endows reward-predictive cues with the scalar value inherent in reward. Such an interpretation does not envision a role for dopamine in more complex cognitive representations between events which underlie many forms of associative learning, restricting the role dopamine can play in learning. The cached-value hypothesis of dopamine makes three concrete predictions about when a phasic dopamine response should be seen and what types of learning this signal should be able to promote. We discuss these predictions in light of recent evidence which we believe provide particularly strong tests of their validity. In doing so, we find that while the phasic dopamine signal conforms to a cached-value account in some circumstances, other evidence demonstrate that this signal is not restricted to a model-free cached-value reinforcement learning signal. In light of this evidence, we argue that the phasic dopamine signal functions more generally to signal violations of expectancies to drive real-world associations between events.
机译：目前阶段的多巴胺误差信号目前认为萨顿和巴特（1987,1998）无模型加强学习算法（Schultz等，1997）中的预测误差是同义的。该理论认为，相位相多巴胺反映了缓存值信号，其赋予奖励预测性提示，以奖励中固有的标量值。这种解释并没有设想多巴胺在更复杂的事实之间的角色在提出许多形式的联想学习之间的更复杂的认知陈述中，限制多巴胺可以在学习中发挥作用。多巴胺的缓存值假设对应看出相平性多巴胺响应时的三个具体预测以及该信号应该能够促进哪些类型的学习。我们鉴于最近的证据讨论了这些预测，我们认为我们认为对其有效性特别强烈的测试。在这样做时，我们发现在某些情况下，阶段的多巴胺信号符合缓存值账户，其他证据表明该信号不限于无模型缓存值增强学习信号。鉴于这种证据，我们认为相序的多巴胺信号更常用，以发出违反事件之间的真实关联的违规的延期。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号