Similarity in motion binds and bends judgments of aspect ratio

IF 1.5 4区 心理学 Q4 NEUROSCIENCES
Görkem Er, Timothy D. Sweeny
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引用次数: 0

Abstract

It is well known that objects become grouped in perceptual organization when they share some visual feature, like a common direction of motion. Less well known is that grouping can change how people perceive a set of objects. For example, when a pair of shapes consistently share a common region of space, their aspect ratios tend to be perceived as more similar (are attracted toward each other). Conversely, when shapes are assigned to different regions in space their aspect ratios repel from each other. Here we examine whether the visual system produce both attractive and repulsive distortions when the state of grouping between a pair of shapes changes on a moment-to-moment basis. Observers viewed a pair of ellipses that differed in terms of how flat or tall they were and reported the aspect ratio of one ellipse from the pair. Each ellipse was defined by a cloud of coherently-moving dots, and the dots within the two ellipses had either the same or different directions of motion, varying from trial-to-trial. We found that the cued ellipse's aspect ratio was reported to be repelled from the aspect ratio of the uncued ellipse when the shapes had different directions of motion compared to when they had the same direction of motion. These results suggest that the visual system can adaptively alter visual experience based on grouping, in particular, repelling the appearance of objects when they do not appear to go together, and it can do so quickly and flexibly.

运动中的相似性约束和弯曲了对长宽比的判断
众所周知,当物体具有某些共同的视觉特征(如共同的运动方向)时,它们就会在知觉组织中被分组。鲜为人知的是,分组可以改变人们对一组物体的感知方式。例如,当一对形状持续共享一个共同的空间区域时,它们的长宽比往往会被认为更加相似(相互吸引)。相反,当形状被分配到不同的空间区域时,它们的长宽比就会相互排斥。在此,我们研究了当一对图形的分组状态在瞬间发生变化时,视觉系统是否会同时产生吸引和排斥失真。观察者看到的是一对椭圆,它们在扁平或高度上存在差异,观察者报告这对椭圆中一个椭圆的长宽比。每个椭圆都由一团连贯运动的圆点所定义,两个椭圆内的圆点的运动方向或相同或不同,在不同的试验中各不相同。我们发现,与运动方向相同的椭圆形相比,当运动方向不同时,提示椭圆形的长宽比与未提示椭圆形的长宽比相斥。这些结果表明,视觉系统可以在分组的基础上适应性地改变视觉体验,特别是当物体看起来并不在一起时,视觉系统会排斥它们的出现,而且可以快速灵活地做到这一点。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Vision Research
Vision Research 医学-神经科学
CiteScore
3.70
自引率
16.70%
发文量
111
审稿时长
66 days
期刊介绍: Vision Research is a journal devoted to the functional aspects of human, vertebrate and invertebrate vision and publishes experimental and observational studies, reviews, and theoretical and computational analyses. Vision Research also publishes clinical studies relevant to normal visual function and basic research relevant to visual dysfunction or its clinical investigation. Functional aspects of vision is interpreted broadly, ranging from molecular and cellular function to perception and behavior. Detailed descriptions are encouraged but enough introductory background should be included for non-specialists. Theoretical and computational papers should give a sense of order to the facts or point to new verifiable observations. Papers dealing with questions in the history of vision science should stress the development of ideas in the field.
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