...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Brain and Neuroscience Advances >Model-based and model-free pain avoidance learning:
【24h】

Model-based and model-free pain avoidance learning:

机译：基于模型和无模型的疼痛避免学习：

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Background: While there is good evidence that reward learning is underpinned by two distinct decision control systems – a cognitive ‘model-based’ and a habitbased ‘model-free’ system, a comparable distinction for punishment avoidance has been much less clear. Methods: We implemented a pain avoidance task that placed differential emphasis on putative model-based and model-free processing, mirroring a paradigm and modelling approach recently developed for reward-based decision-making. Subjects performed a two-step decision-making task with probabilistic pain outcomes of different quantities. The delivery of outcomes was sometimes contingent on a rule signalled at the beginning of each trial, emulating a form of outcome devaluation. Results: The behavioural data showed that subjects tended to use a mixed strategy – favouring the simpler model-free learning strategy when outcomes did not depend on the rule, and favouring a model-based when they did. Furthermore, the data were well described by a dynamic transition model between the two controllers. When compared with data from a reward-based task (albeit tested in the context of the scanner), we observed that avoidance involved a significantly greater tendency for subjects to switch between model-free and model-based systems in the face of changes in uncertainty. Conclusion: Our study suggests a dual-system model of pain avoidance, similar to but possibly more dynamically flexible than reward-based decision-making.
机译：背景：虽然有充分的证据表明奖励学习是由两种不同的决策控制系统（基于认知的“基于模型”的系统和基于习惯的“无模型”的系统）来支持的，但是对于避免惩罚的可比性区分却还不清楚。方法：我们实施了一项避免痛苦的任务，该任务将差异性重点放在基于模型的假定和无模型的处理上，以反映最近针对基于奖励的决策制定的范例和建模方法。受试者执行了两步的决策任务，具有不同数量的概率性疼痛结果。结果的交付有时取决于每次试验开始时发出的规则，模拟结果贬值的一种形式。结果：行为数据表明，受试者倾向于使用混合策略-当结果不取决于规则时，则倾向于采用较简单的无模型学习策略;而当结果取决于规则时，则倾向于基于模型的学习策略。此外，两个控制器之间的动态转换模型很好地描述了数据。与来自奖励任务的数据（尽管在扫描仪的环境下进行测试）进行比较时，我们观察到，面对不确定性的变化，回避涉及受试者在无模型系统和基于模型的系统之间切换的明显更大的趋势。 。结论：我们的研究提出了一种避免疼痛的双系统模型，该模型与基于奖励的决策类似，但可能更灵活。

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