The role of color and attention-to-color in mirror-symmetry perception.
The role of color and attention-to-color in mirror-symmetry perception.
复制标题
DOI：
10.1038/srep29287
复制
发表时间：
2016-07-11
影响因子：
4.6
通讯作者：
Rainville S
中科院分区：
文献类型：
--
作者：
Gheorghiu E;Kingdom FAA;Remkes A;Li HO;Rainville S
颜色在镜像对称视觉感知中的作用是有争议的。一些报告支持存在颜色选择性镜像对称通道，另一些则认为镜像对称感知仅仅对对称轴上的颜色相关性敏感。在这里，我们在这两个想法之间进行测试。刺激由镜像对称或准随机排列的彩色高斯斑点组成。我们使用了四种安排：（1）“分离的”-对称斑点是一种颜色，随机斑点是另一种颜色;（2）“随机分离的”-如上所述，但在每次试验中随机选择对称颜色;（3）“非分离的”-对称斑点是所有颜色的比例相等，随机斑点也是如此;（4）“反对称”--对称斑点在对称轴上呈相反的颜色。我们发现：（a）反对称条件下的近似机会水平，表明对称感知对对称轴上的颜色相关性敏感;（B）随机隔离和非隔离条件下的相似表现，不支持镜像对称是颜色选择性的观点;（c）颜色分离条件下的最高性能，但仅当观察者事先知道对称颜色时，这表明对称性检测受益于基于颜色的注意。我们的结论是，镜像对称检测机制，而敏感的颜色相关性的对称轴和注意力的颜色的好处，是没有颜色选择性。
The role of color in the visual perception of mirror-symmetry is controversial. Some reports support the existence of color-selective mirror-symmetry channels, others that mirror-symmetry perception is merely sensitive to color-correlations across the symmetry axis. Here we test between the two ideas. Stimuli consisted of colored Gaussian-blobs arranged either mirror-symmetrically or quasi-randomly. We used four arrangements: (1) ‘segregated’ – symmetric blobs were of one color, random blobs of the other color(s); (2) ‘random-segregated’ – as above but with the symmetric color randomly selected on each trial; (3) ‘non-segregated’ – symmetric blobs were of all colors in equal proportions, as were the random blobs; (4) ‘anti-symmetric’ – symmetric blobs were of opposite-color across the symmetry axis. We found: (a) near-chance levels for the anti-symmetric condition, suggesting that symmetry perception is sensitive to color-correlations across the symmetry axis; (b) similar performance for random-segregated and non-segregated conditions, giving no support to the idea that mirror-symmetry is color selective; (c) highest performance for the color-segregated condition, but only when the observer knew beforehand the symmetry color, suggesting that symmetry detection benefits from color-based attention. We conclude that mirror-symmetry detection mechanisms, while sensitive to color-correlations across the symmetry axis and subject to the benefits of attention-to-color, are not color selective.