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解开负增强,工作记忆和演推理在高BMI中的缺陷.
Gibson Weydmann1, Igor Palmieri2, Reinaldo A G Simões2
1Programa de Pós-Graduação em Psicologia, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos 2600, Porto Alegre, Brazil; Universidade La Salle, Canoas, Brazil.
Progress in neuro-psychopharmacology & biological psychiatry
|October 14, 2024
概括
超重或肥胖的个体表现出受损的负面强化和基于模型的学习,表现出倾向于重复行为尽管负面反. 这种认知缺陷与肥胖有关,而不是工作记忆问题.
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
- 肥胖问题研究研究
背景情况:
- 神经心理学研究表明,超重/肥胖个体可能会坚持尽管负面反行为.
- 潜在的因素包括工作记忆 (WM) 缺陷或基于模型的学习策略受损.
- 强化学习 (RL) 模型提供了一个研究这些认知过程的框架.
研究的目的:
- 为了比较超重/肥胖 (Ow/Ob) 个体与正常体重对照者之间的强化学习 (RL) 任务中的认知表现.
- 调查消极强化和基于模型的学习方面的潜在缺陷.
- 区分工作记忆 (WM) 和基于模型的学习在Ow/Ob个体的RL表现中的作用.
主要方法:
- 对Ow/Ob (n=30) 和正常体重 (n=42) 的参与者进行了修改后的RL任务.
- 操纵认知负载以控制工作记忆 (WM) 效应.
- 计算建模分析了RL参数,WM使用,以及基于模型的学习的扣除参数.
主要成果:
- Ow/Ob受试者表现出更高的坚持性错误频率,这表明负面增强受损.
- 在Ow/Ob个体中观察到较弱的扣除机制,表明基于模型的学习缺陷.
- 在Ow/Ob群体中,工作记忆 (WM) 障碍并不是RL缺陷的主要原因.
结论:
- 肥胖与负面强化和基于模型的学习的显著损害有关.
- 这些认知缺陷与工作记忆 (WM) 障碍不同.
- 研究结果强调了与超重和肥胖相关的特定认知变化.
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