在自然场景中大小恒定的神经时间过程
Lu-Chun Yeh1, Surya Gayet2, Daniel Kaiser3
1Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, the Netherlands; Neural Computation Group, Department of Mathematics and Computer Science, Physics, Geography, Justus Liebig University Gießen, Germany.
概括
了解大小常数,大脑的大脑常数.
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
- 视觉感知 视觉感知 视觉感知
背景情况:
- 准确的尺寸感知依赖于尺寸常数,将视网膜尺寸与距离整合起来.
- 基于场景的大小恒定的神经机制和时间尚未得到充分理解.
研究的目的:
- 为了研究神经时间过程,提取图形距离线索并将它们与视网膜尺寸信息集成.
- 为了确定大脑何时以及如何处理基于场景的尺寸常数.
主要方法:
- 参与者在场景照片中以不同的距离观看不同大小的视网膜物体.
- 时间解析脑电图 (EEG) 和多变量模式分析 (MVPA) 用于解码物体大小和距离信息.
- 分析的重点是根据距离解码视网膜大小,反映大小常数.
主要成果:
- 视网膜物体大小是从EEG数据解码的,从场景发生后80毫秒开始.
- 距离信息模块化大小解码显著晚了,固定对象开始于200 ms,边缘视觉开始于280 ms.
- 这些调制发生在物体在感知上相似时 (大-近,小-远) 与大小不同时 (大-远,小-近).
结论:
- 大脑在场景呈现时迅速处理视网膜物体大小.
- 基于场景的尺寸常数,整合距离线索,是一个后来的神经过程.
- 研究结果揭示了自然主义场景中视觉尺寸恒定的时间动态.
相关概念视频
01:15Depth Perception and Spatial Vision
Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
01:12Perceptual Constancy
Perceptual constancy is the ability to recognize that objects remain consistent and unchanged even when their appearance varies due to changes in sensory input. There are four main types of perceptual constancy: size constancy, shape constancy, color constancy, and brightness constancy.
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...