威胁预期并没有改善感知歧视,尽管它在前线对等网络中引起了高度优先处理
Nadia Haddara1, Dobromir Rahnev2
1School of Psychology, Georgia Institute of Technology, Atlanta, Georgia 30332 nadiahaddara@gmail.com.
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
- 感官感知是一种感官感知.
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.
- 这种神经增强是否转化为更好的感知表现仍有争议.
研究的目的:
- 调查威胁暗示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:
- 利用功能磁共振成像 (fMRI) 来监测46名参与者的大脑活动.
- 使用随机点影像图与威胁,安全或中立线索来执行感知决策任务.
- 参与者在提示提示后确定了运动方向.
主要成果:
- 与安全或中性线索相比,威胁线索没有显著提高感知灵敏度.
- 威胁线索引发了广泛的前对称脑活动,以及右侧胰岛与前对称网络之间的连接性增加.
- 在感知决策中的行为表现并未通过威胁线索得到改善.
结论:
- 威胁的预期并不自动提高感知灵敏度.
- 面对面的网络在优先处理环境威胁线索方面发挥着至关重要的作用,而不是直接改善感官感知.
- 这些发现挑战了关于威胁感知及其神经支的直观假设.
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