目标-侧翼相似性改变了视觉拥挤的空间轮廓。

IF 2.3 4区 心理学 Q2 OPHTHALMOLOGY
Kristian P Skoczek, Jennifer H Acton, John A Greenwood, Tony Redmond
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引用次数: 0

摘要

视觉拥挤是附近细节对目标感知的破坏性影响。这种影响取决于目标和侧翼元素之间的空间分离和感知相似性。然而,目前尚不清楚这些同时的影响是如何结合起来产生最终的“拥挤”的感觉,因为侧翼穿过拥挤区的极限。我们研究了一个外周呈现的Landolt-C靶和一对同时呈现的Landolt-C靶在不同水平的靶侧相似性(相对取向)、空间分离和靶偏心率上的外观。利用目标和侧卫方向信号加权组合模拟误差的池化模型拟合报告目标方向误差的分布。误差分布随目标与侧卫间距(“空间剖面”)的变化用logistic函数拟合,估计目标与侧卫信号权重随目标与侧卫空间间隔减小(斜率)和信号平衡的空间间隔(中点)的变化率。我们发现,随着目标侧翼相似性的降低,空间剖面的斜率增加,在目标偏心率上具有相似的调制模式。空间剖面中点随偏心率呈线性增加,符合Bouma定律,但目标-侧翼相似度不变。这表明相似性相关的调制可以在每个偏心率的固定空间范围内运行。研究拥挤的空间分布,将与目标和侧翼者的外观(即相似性)相关的效应与外观无关的影响分开,这些影响在使用其他常用措施定义拥挤区范围时可能会混淆。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Target-flanker similarity alters the spatial profile of visual crowding.

Visual crowding is the disruptive effect of nearby details on the perception of a target. This influence is dependent on both spatial separation and perceived similarity between target and flanker elements. However, it is not clear how these simultaneous influences combine to produce the final "crowded" percept as flankers traverse the limits of the crowding zone. We investigated the reported appearance of a peripherally presented Landolt-C target flanked by a pair of simultaneously presented Landolt-Cs across different levels of target-flanker similarity (relative orientation), spatial separation, and target eccentricity. The distributions of errors in reported target orientation were fitted with a pooling model that simulated errors using a weighted combination of target and flanker orientation signals. The change in error distribution with target-flanker spacing (the "spatial profile") was fitted with a logistic function, estimating both the rate at which target- and flanker-signal weighting varies as target-flanker spatial separation decreases (slope) and the spatial separation at which signals were balanced (midpoint). We found that the slope of the spatial profile increases as target-flanker similarity decreases, with similar modulation patterns across target eccentricities. In contrast, spatial profile midpoints increased linearly with eccentricity, in line with Bouma's law, but were invariant of target-flanker similarity. This suggests similarity-related modulation may operate within a fixed spatial extent at each eccentricity. Investigating the spatial profile of crowding disentangles effects related to the appearance of targets and flankers (i.e., similarity) from appearance-independent influences, which can be confounded when using other common measures to define crowding zone extent.

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来源期刊
Journal of Vision
Journal of Vision 医学-眼科学
CiteScore
2.90
自引率
5.60%
发文量
218
审稿时长
3-6 weeks
期刊介绍: Exploring all aspects of biological visual function, including spatial vision, perception, low vision, color vision and more, spanning the fields of neuroscience, psychology and psychophysics.
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