引起的压力对无模型和基于模型的强化学习对酒精使用障碍患者的影响
Florent Wyckmans1, Armand Chatard2, Charles Kornreich1
1Laboratoire de Psychologie Médicale et d'Addictologie, Université Libre de Bruxelles (ULB), place Van Gehuchten 4, 1020 Brussels, Belgium.
与对照组相比,患有酒精使用障碍 (AUD) 的个人表现出较少的基于模型的学习和改变的压力反应. 在AUD,压力对决策产生不同的影响,这突显了这一群体的独特挑战.
科学领域:
- 神经科学是一个神经科学.
- 心理学 心理学 心理学
- 临床研究 临床研究
背景情况:
- 在压力下理解评估强化学习 (无模型/MF和基于模型/MB) 对酒精使用障碍 (AUD) 至关重要.
- 以前的研究还没有充分研究压力如何影响AUD患者的决策.
研究的目的:
- 为了确定与对照人群相比,有AUD的个体是否表现出更大的倾向于MF (回顾性) 而不是MB (前性) 学习.
- 检查诱导的社会压力对AUD的决策过程的影响.
主要方法:
- 117名参与者 (55名AUD,62名对照) 通过社会评估冷压器任务 (SECPT) 经历了急性社会压力.
- 基于模型 (MB) 和无模型 (MF) 的学习倾向被评估,使用两步马尔科夫任务.
- 脑下垂体 - 脑下垂体 - 上腺轴应激反应通过唾液皮质醇测量.
主要成果:
- 两组之间基线皮质醇或SECPT反应没有显著差异.
- 与对照人群相比,患有AUD的个体对MB策略的依赖程度较低.
- 在健康的参与者中,压力减少了对MB策略的依赖,但在AUD患者中却没有.
结论:
- 患有AUD的个体表现出MB和MF强化学习的非典型压力调制.
- 研究结果表明,在压力下未经治疗的AUD中存在独特的决策模式.
- 探讨这些改变的学习机制的潜在临床影响.
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