厌恶性影响对分类决策的神经机制的影响
Daniel J Levitas1, Kess L Folco1, Thomas W James1
1Department of Psychological and Brain Sciences, Indiana University, Bloomington, Indiana, USA.
Brain and behavior
|November 16, 2023
概括
情感突出,就像观看令人不安的图像一样,通过改变神经证据积累来减缓决策. 这项研究表明,高情感突出性增加了决策门,影响了大脑如何处理信息.
科学领域:
- 认知神经科学 认知神经科学
- 决策研究 决策研究
- 情感科学是一种情感科学.
背景情况:
- 证据积累模型是理解决策的关键,具有漂移率和决策值等参数.
- 神经信号经常模仿这些积累参数,但它们与被操纵的感觉或记忆数据的联系尚未得到充分探索.
- 情感突出性对神经证据积累的影响在很大程度上仍未得到研究.
研究的目的:
- 研究情感突出如何影响决策过程中的神经积累参数.
- 为了确定实验操作的情感突出是否会影响神经信号的漂移率和决策值.
主要方法:
- 一个两种选择的对象分类任务,使用不同的情感突出 (厌恶特征) 的身体图像 (脚/手).
- 通过功能磁共振成像 (fMRI) 使用逐步揭示范式来延长认知处理.
- 分析的重点是感兴趣的视觉积累区域,以评估神经积累参数.
主要成果:
- 高情感突出性起到了分心的作用,减缓了决策时间,并增加了视觉积累区域的峰值激活时间.
- 意想不到的是,高情感突出性改变了漂移率 (较浅) 和决策值 (较高).
- 这项研究提供了第一个实验性操纵感官数据改变神经决策值的证据.
结论:
- 情感突出显著影响神经证据积累参数,特别是通过增加决策值.
- 这些发现增强了对情感反应中的神经机制及其对对象表示和分类的影响的理解.
- 这项研究弥合了情感科学与神经层面决策的认知模型之间的差距.
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