Predicting how color and shape combine in the human visual system to direct attention
Predicting how color and shape combine in the human visual system to direct attention
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DOI：
10.1038/s41598-019-56238-9
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发表时间：
2019-12-30
影响因子：
4.6
通讯作者：
Lleras, Alejandro
中科院分区：
文献类型：
--
作者：
Buetti, Simona;Xu, Jing;Lleras, Alejandro
场景中的对象可以沿着多种视觉属性(如颜色和形状)相互区分，并且对象与其周围环境的区别越明显，就越容易找到它。然而，这种独特性优势究竟是如何在视觉中产生的，目前还不是很清楚。在这里，我们研究了不同视觉属性(颜色和形状，在四个实验中进行评估)的视觉清晰度是否以及如何组合在一起来确定场景中对象的总体清晰度。在六个不同的实验中，目标物体与分心物体在颜色和形状上都不同，一维显著性分数被用来预测表现。结果表明，总体区分性是每个视觉属性的区分值的简单和，这是决定总体区分性的数学规律。因此，大脑必须独立计算每个视觉属性的区别性分数，然后才能将它们相加成引导人类注意力的总分数。
Objects in a scene can be distinct from one another along a multitude of visual attributes, such as color and shape, and the more distinct an object is from its surroundings, the easier it is to find it. However, exactly how this distinctiveness advantage arises in vision is not well understood. Here we studied whether and how visual distinctiveness along different visual attributes (color and shape, assessed in four experiments) combine to determine an object's overall distinctiveness in a scene. Unidimensional distinctiveness scores were used to predict performance in six separate experiments where a target object differed from distractor objects along both color and shape. Results showed that there is mathematical law determining overall distinctiveness as the simple sum of the distinctiveness scores along each visual attribute. Thus, the brain must compute distinctiveness scores independently for each visual attribute before summing them into the overall score that directs human attention.