Categorical sensitivity to color differences.
Categorical sensitivity to color differences.
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DOI：
10.1167/13.7.1
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发表时间：
2013-06
影响因子：
1.8
通讯作者：
C. Witzel;K. Gegenfurtner
中科院分区：
文献类型：
--
作者：
C. Witzel;K. Gegenfurtner
类别感知提供了颜色感知和对应于基本颜色词的语言类别之间的潜在联系。我们研究了第二阶段的色彩机制的感官信息是否进一步处理，以便对颜色差异的敏感性产生分类感知。在这种情况下，对颜色差异的敏感度应该高于类别边界内。我们测量的歧视阈值（JND）和颜色类别周围的等亮度色调圆Derrington-Krauskopf-Lennie（DKL）的颜色空间在三个亮度水平。在等亮度下，JND的全局图案大致遵循椭圆。椭圆的偏离与橙粉色和蓝绿色的类别边界相吻合，但这些最小值也与第二阶段的锥-对手机制相一致。没有证据表明分类感知的颜色被发现的任何其他类别的边界。在较低的亮度，类别发生了很大的变化，但JND没有相应的变化。我们的研究结果表明，颜色分类和歧视之间的关系松散。然而，一些边界与JND最小值的重合并不是颜色分类边界的一般性质。因此，我们辨别颜色的基本能力不能完全解释为什么我们使用特定的类别来交流颜色。此外，这些发现严重挑战了颜色命名形成颜色分类感知基础的观点。相对于以前的研究，集中在绿色-蓝色的边界，我们的研究结果突出了控制感知距离和检查的全套类别时，调查类别对颜色感知的影响的重要性。
Categorical perception provides a potential link between color perception and the linguistic categories that correspond to the basic color terms. We examined whether the sensory information of the second-stage chromatic mechanisms is further processed so that sensitivity for color differences yields categorical perception. In this case, sensitivity for color differences should be higher across than within category boundaries. We measured discrimination thresholds (JNDs) and color categories around an isoluminant hue circle in Derrington-Krauskopf-Lennie (DKL) color space at three levels of lightness. At isoluminant lightness, the global pattern of JNDs coarsely followed an ellipse. Deviations from the ellipse coincided with the orange-pink and the blue-green category borders, but these minima were also aligned with the second-stage cone-opponent mechanisms. No evidence for categorical perception of color was found for any other category borders. At lower lightness, categories changed substantially, but JNDs did not change accordingly. Our results point to a loose relationship between color categorization and discrimination. However, the coincidence of some boundaries with JND minima is not a general property of color categorical boundaries. Hence, our basic ability to discriminate colors cannot fully explain why we use the particular set of categories to communicate about colors. Moreover, these findings seriously challenge the idea that color naming forms the basis for the categorical perception of colors. With respect to previous studies that concentrated on the green-blue boundary, our results highlight the importance of controlling perceptual distances and examining the full set of categories when investigating category effects on color perception.