在调节对比视觉感知时,共享的前性和外源性注意力机制
1Department of Psychology and Behavioral Sciences, Zhejiang University, Hangzhou, China.
Cognition
|October 14, 2025
概括
在眼睛运动之前的注意力改变了视觉感知,类似于非自愿的外源注意力,而不是自愿的内源注意力. 这表明,在视觉处理中,在前性注意力和外源性注意力之间存在共同的机制.
科学领域:
- 认知神经科学 认知神经科学
- 视觉感知研究 视觉感知研究
- 眼科医生 眼科 眼科
背景情况:
- 隐藏的注意力显著影响视觉感知,外源的注意力根据刺激强度不同地影响对比的外观.
- 相比之下,内生注意力均地增强了对比感知.
- 眼睛运动前的注意力对视觉感知的影响 (先前的注意力) 仍然在很大程度上未被探索.
研究的目的:
- 为了研究前性注意力对主观视觉感知的影响,特别是对比的外观.
- 为了比较前性注意的效果与外源性和内源性注意的效果.
- 探索前性注意力与其他形式的注意力之间的关系.
主要方法:
- 使用与人类成年参与者的心理物理实验 (N=29,24,22在三个实验).
- 在不同注意条件下测量低和高对比刺激的主观对比外观,先前的saccades.
- 分析在saccade准备过程中注意力效应的积累以及不同注意力类型之间的相关性.
主要成果:
- 病前注意力增强了低对比度刺激的出现,并减弱了高对比度刺激,反映了外来注意力.
- 在萨卡德准备过程中积累的前萨卡德注意力减弱效应.
- 在前性和外源性注意力之间发现了正相关性,但在内源性注意力和其他两种注意力之间没有正相关性.
结论:
- 在调节基本视觉特征 (如对比的外观) 时,前性注意力与外源性注意力共享潜在机制.
- 隐藏的内源性注意力似乎通过不同的神经机制运作,而不是前突发性和外源性注意力.
- 这些发现为眼动和注意力在塑造视觉感知中的相互作用提供了新的见解.
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