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在强迫症障碍中,基于模型和无模型的强化学习之间的仲裁损害
Zhongqiang Ruan1, Carol A Seger1,2, Qiong Yang3
1Guangdong Key Laboratory of Mental Health and Cognitive Science, School of Psychology, Center for Studies of Psychological Application, South China Normal University, Guangzhou, China.
强迫性障碍 (OCD) 涉及由于目标导向和习惯性学习系统之间的错误仲裁导致行为控制受损. 这项研究发现,这种障碍影响着强迫症患者和健康个体,强迫症库存修订 (OCI-R) 评分高.
科学领域:
- 神经科学是一个神经科学.
- 认知心理学 认知心理学
- 精神病学是一个精神病学.
背景情况:
- 强迫症 (OCD) 与目标定向和习惯性学习系统的不平衡有关.
- 目前尚不清楚,强迫症是否源于单一系统的缺陷,还是这些系统之间进行选择的仲裁机制的故障.
研究的目的:
- 调查仲裁机制在强迫症中所扮演的角色.
- 为了比较强迫症患者的行为控制策略和健康的对照,具有不同的强迫症库存修订 (OCI-R) 评分.
主要方法:
- 对30名强迫症患者和120名健康对照进行了2个选择,3个阶段的马尔科夫决策范式.
- 强化学习模型估计了以目标为导向 (基于模型) 和习惯性 (无模型) 的学习.
- 参与者被分为强迫症患者,高OCI-R对照和低OCI-R对照.
主要成果:
- 与对照组相比,强迫症患者的策略选择不太合适,当基于模型的最佳时,他们倾向于没有模型的策略.
- 强迫症患者和高OCI-R对照都显示,当无模型策略是最佳时,系统切换增加,这表明仲裁受损.
- 这些差异具有统计学意义 (p < 0.05).
结论:
- 研究结果表明,强迫症患者的灵活适应机制受损的仲裁机制.
- 在高OCI-R分数的健康个体中,仲裁的缺陷也存在.
- 这突出了一个潜在的共同机制背后的强迫症和高特征类强迫行为.
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