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Visualizing Visual Adaptation
Published on: April 24, 2017
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取向选择性适应和倾斜后效应从看不见的模式.
1Department of Psychology, University of Minnesota, 75 East River Road, Minneapolis, Minnesota 55455, USA. sheng@tc.umn.edu
Nature
|May 25, 2001
概括
即使是看不见的细微视觉模式也可以改变感知. 这项研究表明,看不见的高频网格会产生后续效应,影响对比度灵敏度和倾斜感知,表明神经处理没有意识意识.
科学领域:
- 视觉神经科学是一种神经科学.
- 感知心理学 感知心理学
背景情况:
- 视觉图案暴露会导致感知后果,包括对类似图案的敏感性降低和过度倾斜感知.
- 这些后果通常与可见刺激有关.
研究的目的:
- 为了调查是否有视觉后效应发生的刺激是太细,无法被感知.
- 为了确定看不见的高空间频率格子是否会影响对比度检测和倾斜感知.
主要方法:
- 观察者接触到非常细的格子 (高空间频率),无法与均场区分.
- 测试格子的对比度检测值被测量在与未见的预曝光格子相对的不同方向.
- 倾斜后效应是根据测试模式的感知方向来评估的.
主要成果:
- 在暴露于不可察觉的格子后,观察者需要更高的对比度来检测相同方向的测试格子.
- 观察到一个倾斜后效应,取决于看不见的预曝光格子的方向.
- 这些效应甚至发生在预曝光格子没有有意识地解决的情况下.
结论:
- 视觉后效应可以由低于意识感知值的刺激引起.
- 未见的细微视觉细节由视觉皮层中的定向敏感机制处理.
- 神经表达和处理发生在没有意识意识到极其精细的视觉信息的情况下.
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