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在避免惩罚和同时追求奖励时,工作记忆和强化学习如何相互作用
Peter F Hitchcock1, Joonhwa Kim2, Michael J Frank3
1Department of Psychology, Emory University.
人类使用不同的强化学习 (RL) 和工作记忆 (WM) 系统. 这项研究表明WM有助于避免即时的惩罚,而RL则与惩罚记忆作斗争,个人差异影响了这种互动.
科学领域:
- 认知神经科学
- 行为心理学
- 计算精神病学
背景情况:
- 人类的适应行为依赖于强化学习 (RL) 和工作记忆 (WM) 系统.
- 在奖励和惩罚的同时学习过程中,RL和WM之间的相互作用还不太清楚.
- 精神症状对这些学习系统的影响需要进一步研究.
研究的目的:
- 调查RL和WM在学习避免惩罚之间的相互作用.
- 为了检查WM如何影响RL在同时奖励和惩罚学习.
- 评估抑郁,焦虑和反思对这些学习过程的影响.
主要方法:
- 一个新的奖励/惩罚 RL-WM 任务被用于在线样本 (N=298).
- 计算机建模用于分析学习模式和系统交互.
- 交叉测试阶段评估了基于RL的保留和WM对RL的影响.
主要成果:
- 工作记忆 (WM) 有助于避免即时处罚,但强化学习 (RL) 系统很难保留这一点.
- 在学习过程中观察到WM减弱RL的证据,但在进一步学习后这种效应减弱了.
- 个体差异调节了WM-RL相互作用,一些个体显示WM促进保留.
- 尽管有抑郁,焦虑和反省,
结论:
- WM 系统支持短期避免惩罚,而 RL 系统显示对惩罚信息的保留有限.
- 个人差异对WM影响RL的程度有很大影响.
- 这项任务的行为表现很适应心理症状如抑郁和焦虑.
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