色调或对比度的局部变化对事物对称性的贡献
The contribution of local variations in hue or contrast to symmetry of things in a thing
摘要：
对称性有助于生物视觉中的感知组织过程，并影响动物和人类目标导向决策的质量和时间，正如最近关于事物中事物对称性和双边形状对称性的例子所讨论的那样。本研究的目的是表明，选择性的颜色变化的几何形状配置与镜像对称，可以利用突出的功能特性的对称性的东西在一个东西在人类视觉。实验过程使用心理物理学的两种选择强制选择技术，人类观察者必须尽快决定计算机屏幕上同时呈现的两个形状是否对称。刺激是由多个元素组成的计算机生成的2D形状配置，具有或不具有局部颜色、颜色饱和度或非彩色对比度的系统变化，从而产生事物中事物的对称性变化。所有的刺激对都具有完美的几何镜像对称性。结果表明，在多色和单色形状中选择性地改变局部形状元素的颜色显着减慢感知响应时间，这是刺激不确定性的直接测量。它的结论是，色调或对比度的局部变化产生功能上有意义的变化的对称性的东西的东西，在这里透露的对称性检测相关的感知变量。后者的干扰增加了刺激的不确定性，从而影响了目标相关的人类决策的时间过程中的镜像对称性的感知显着性。
英文摘要：
Symmetry contributes to processes of perceptual organization in biological vision and influences the quality and time of goal directed decision making in animals and humans, as discussed in recent work on the examples of symmetry of things in a thing and bilateral shape symmetry. The present study was designed to show that selective chromatic variations in geometric shape configurations with mirror symmetry can be exploited to highlight functional properties of symmetry of things in a thing in human vision. The experimental procedure uses a psychophysical two alternative forced choice technique, where human observers have to decide as swiftly as possible whether two shapes presented simultaneously on a computer screen are symmetrical or not. The stimuli are computer generated 2D shape configurations consisting of multiple elements, with and without systematic variations in local color, color saturation, or achromatic contrast producing variations in symmetry of things in a thing. All stimulus pairs presented had perfect geometric mirror symmetry. The results show that varying the color of local shape elements selectively in multichromatic and monochromatic shapes significantly slows down perceptual response times, which are a direct measure of stimulus uncertainty. It is concluded that local variations in hue or contrast produce functionally meaningful variations in symmetry of things in thing, revealed here as a relevant perceptual variable in symmetry detection. Disturbance of the latter increases stimulus uncertainty and thereby affects the perceptual salience of mirror symmetry in the time course for goal relevant human decisions.
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