Perceptual distance between colored stimuli in the lizard Anolis sagrei: comparing visual system models to empirical results
Perceptual distance between colored stimuli in the lizard Anolis sagrei: comparing visual system models to empirical results
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DOI：
10.1007/s00265-016-2072-8
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发表时间：
2016-04-01
影响因子：
2.3
通讯作者：
Almonte, Elizabeth
中科院分区：
文献类型：
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作者：
Fleishman, Leo J.;Perez, Carley W.;Almonte, Elizabeth
在动物颜色进化的研究中，一对颜色的显著性（例如，刺激对背景）通常通过确定它们之间在感知颜色空间中的距离来建模。对于相似的颜色，受体噪声模型已被证明是一种有效的方法来估计的歧视阈值。然而，量化感知空间中距离较远的颜色对的显著性的最佳方法并没有得到广泛认同。在实验中，动物被呈现不同的颜色，它可以很容易地区分，它的反应可能会受到强烈影响的生物意义的颜色，除了其显着性，一种现象称为颜色分类。这使得难以测试和确认不同感知距离模型的有效性。我们测试了不同的刺激/背景颜色组合的蜥蜴Anolis sagrei使用视觉注意反射，这已在早期的实验中被证明是受颜色分类比其他常用的行为测定的影响较小的相对显著性。我们将结果与基于两种不同视觉系统模型的预测进行了比较。蜥蜴色品图中绘制的点对之间的欧几里德距离有效地预测了相对响应。一个受体噪声模型，其中颜色空间距离估计的单位“只是明显的差异”，产生了类似的准确预测的结果。我们的结论是，对于颜色信号演变的研究，这些方法中的任何一种都可以有效地用于在视觉空间中广泛分离的颜色之间的感知距离的行为相关的预测。
In the study of the evolution of animal colors, the conspicuousness of a pair of colors (e.g., stimulus vs. background) is often modeled by determining the distance between them in perceptual color space. For similar colors, receptor noise models have been demonstrated to be an effective way to estimate discrimination thresholds. However, the best way to quantify conspicuousness of color pairs that are distant in perceptual space is not widely agreed upon. In experiments where an animal is presented with different colors that it can easily discriminate, its response may be strongly influenced by the biological significance of a color, in addition to its conspicuousness, a phenomenon known as color categorization. This has made it difficult to test and confirm the validity of different models of perceptual distance. We tested the relative conspicuousness of different stimulus/background color combinations in the lizard Anolis sagrei using a visual attention reflex, which has been shown in earlier experiments to be less influenced by color categorization than other commonly used behavioral assays. We compared the results to predictions based on two different visual system-based models. The Euclidian distance between pairs of points plotted in a lizard chromaticity diagram effectively predicted the relative responses. A receptor noise model, in which color space distance was estimated in units of "just noticeable difference," yielded a similarly accurate prediction of the results. We concluded that for studies of color signal evolution, either of these methods may be effectively employed to make behaviorally-relevant predictions of perceptual distance among colors that are widely separated in visual space.