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反向掩盖意味着凸图形中的皮层-皮层循环过程的上下文效应,以及在解决图形-背景模两可的过程中的皮层-甲状腺循环过程
Mary A Peterson1,2, Elizabeth Salvagio Campbell1,2,3
1Department of Psychology, University of Arizona, Tucson, AZ, United States.
Frontiers in psychology
|October 9, 2023
概括
视觉感知中的图形赋值比以前认为的要复杂得多. 模两可的视觉刺激可以通过大脑中的动态并行处理来解决,涉及皮质流和皮质皮质-皮质循环通路.
科学领域:
- 视觉感知 视觉感知 视觉感知
- 认知神经科学是一种认知神经科学.
- 计算视觉是指计算机视觉.
背景情况:
- 以前的研究表明,基于图像的因素,如凸度,足以进行图形赋值.
- 最近的发现表明,图形分配概率受到显示复杂性和区域均性的影响,挑战更简单的模型.
- 贝叶斯观察者模型预测了同质显示中的模糊性,这表明图形分配不仅仅基于局部凸度.
研究的目的:
- 为了研究在均质的图形-地面显示中提出的模两可.
- 检查凸形图形上下文效应 (CEs) 的时间动态.
- 确定反复处理在图形赋值和模糊性解决中的作用.
主要方法:
- 三项实验使用了具有不同区域数和同质性的视觉显示器.
- 刺激短暂呈现 (100毫秒),然后在不同的刺激间隔 (ISI) 进行模式面具,以探测反复处理.
- 实验3使用二光学呈现来隔离乳头和皮质处理阶段.
主要成果:
- 实验1和2的结果支持循环处理在生成凸形形状CE和解决均显示中的模糊性方面.
- 实验3表明,皮质流体循环处理解决了模糊性,而并行皮质-皮质循环过程产生了CE.
- 这些发现表明,看似明确的刺激在感知组织过程中可能是模糊的.
结论:
- 图形分配是一个动态的过程,随着时间的推移而演变.
- 循环处理,涉及皮质流和皮质-皮质路径,对于解决模两可,并在图像感知中产生上下文效应至关重要.
- 这些发现挑战了以前关于局部图像特征足以用于图形赋值的假设.
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