When luminance increment thresholds depend on apparent lightness.
When luminance increment thresholds depend on apparent lightness.
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DOI：
10.1167/13.6.21
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发表时间：
2012-08
影响因子：
1.8
通讯作者：
M. Maertens;Felix Wichmann
中科院分区：
文献类型：
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作者：
M. Maertens;Felix Wichmann
视知觉研究中的一个基本问题是，对刺激差异的敏感性是受到外部刺激的感觉表征（即近端刺激）的限制，还是受到其感知表征（即，刺激出现。在亮度感知领域，问题转化为辨别阈值是否取决于视网膜图像中的局部亮度或相应图像区域的表观亮度。大多数的研究结果似乎表明，敏感性是有限的感官刺激表示，这将意味着不同的机制刺激的歧视和外观。我们认为这一结论需要加以限定。我们报告的数据表明，歧视和外观判断之间的关系取决于如何准确地测量它们。我们提出了一个理论帐户，提供了一个共同的机制，外观和敏感性。这个模型的一个有趣的推论是，它也解释了同化的感知现象。
A fundamental question in visual perception research is whether the sensitivity to stimulus differences is limited by the sensory representation of the external stimulus, that is, the proximal stimulus, or by its perceptual representation, i.e., stimulus appearance. In the domain of lightness perception, the question translates into whether discrimination thresholds depend on the local luminance in the retinal image or on the apparent lightness of the corresponding image region. The majority of findings seem to indicate that sensitivity is limited by the sensory stimulus representation, which would imply different mechanisms for stimulus discrimination and appearance. We think this conclusion needs to be qualified. We report data suggesting that the relationship between discrimination and appearance judgments depends on how exactly they are being measured. We propose a theoretical account that provides a common mechanism for appearance and sensitivity. An interesting corollary of this model is that it also accounts for the perceptual phenomenon of assimilation.