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圆的增加和减少:近乎线性感知尺度和可变噪声

Yangyi Shi¹, Rhea T Eskew¹

¹Department of Psychology, Northeastern University, Boston, MA 02115, USA.

Vision research

|May 1, 2025

概括

在短波长 (S) 圆刺激中的感知差异在歧视方面显示不对称,但在感知对比方面没有. 一个模型表明S圆路径噪声解释了这些发现,可能是由于S ON和S OFF路径的差异.

科学领域:

视觉科学视觉科学视觉科学
心理物理学的精神物理.
光受体生理学光受体生理学

背景情况:

人类视觉系统通过形光感受器处理光刺激,短波长 (S) 形在色彩视觉中发挥作用.
对于视觉感知模型来说,了解S刺激的增加 (S+) 和减少 (S-) 的处理是至关重要的.

研究的目的:

研究S光受体刺激的增加和减少之间的感知不对称性.
为了比较S+和S-刺激的超值感知缩放和歧视值.
开发一个模型,调和S圆对比的感知尺度和值.

主要方法:

通过增量 (S+) 和减量 (S-) 对比进行了两个心理物理实验.
实验1使用最大概率差异缩放 (MLDS) 程序进行超值感知.
实验2采用了两种替代性强制选择 (2AFC) 方法来测量基座歧视值.

主要成果:

在S+和S-刺激之间的基座歧视值中观察到实质性的不对称性.
对于S圆对比度的感知尺度几乎是线性的,对于S+和S-没有显著的不对称性.
一个提出的模型,假设噪声与刺激对比度的平方根成比例,成功地解释了感知尺度和歧视值.

结论:

尽管有类似的感知对比度缩放,但S+和S-圆信号的处理是不对称的.
歧视值的不对称性可能归因于S ON和S OFF通路之间的生理差异.
噪声模型为S圆形路径中的缩放和歧视数据提供了统一的解释.

关键词:

时间的增长.增加的增量.在MLDS上,MLDS的MLDS是MLDS的MLDS.感知尺度是一个感知尺度.S 关闭 S 关闭在S ON ON S 里面.S 圆圆 S 圆变量噪声是一种变量噪声.

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