威胁预期并没有改善感知歧视,尽管它在前对对联网络中引起了高度优先处理.
Nadia Haddara1, Dobromir Rahnev1
1School of Psychology, Georgia Institute of Technology, Atlanta, GA, USA.
bioRxiv : the preprint server for biology
|July 28, 2023
概括
威胁线索不会提高感知灵敏度,尽管激活了参与威胁处理的大脑区域. 这挑战了预期危险会自动提高我们的感官的想法.
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
- 感官处理 感官处理
背景情况:
- 众所周知,威胁线索可以增加感官和注意力大脑网络中的神经处理.
- 目前尚不清楚这种神经增强是否转化为更好的感知能力.
研究的目的:
- 为了调查威胁线索是否增强感知灵敏度.
- 区分暗示威胁线索改善或不改善知觉的理论.
主要方法:
- 通过将运动方向与厌恶的声音配对来开发威胁刺激.
- 利用功能磁共振成像 (fMRI) 来监测大脑活动.
- 评估感知决策在一个有线任务 (威胁,安全,中立) 与46名参与者.
主要成果:
- 与安全或中性线索相比,威胁线索没有显著增加感知灵敏度.
- 威胁线索导致前侧对象对血氧水平依赖 (BOLD) 活动的增加.
- 观察到右侧胰岛和前侧双面网络之间有较强的连接性.
结论:
- 威胁的预期并不自动提高感知决策能力.
- 面对面的网络在优先处理环境威胁信号方面发挥着至关重要的作用.
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