Wu Xiaogang, Liu Mingyuan, Wang Aijun, Zhang Ming
Department of Psychology, Suzhou University of Science and Technology, Suzhou, China.
Department of Psychology, Research Center for Psychology and Behavioral Sciences, Soochow University, Suzhou, China.
Psych J. 2023 Feb;12(1):25-33. doi: 10.1002/pchj.604. Epub 2022 Sep 27.
The size-eccentricity effect is a perceptual distortion phenomenon in which a peripherally located object is perceived to be smaller than a centrally located object. Although the increase in apparent object size caused by attention has been documented, little is known about the effect of different sizes of attentional focus on object appearance. The present study investigated how different sizes of attentional focus affect the size-eccentricity effect using a spatial pre-cueing paradigm. Additionally, we examined the influence of different task types on size perception. A peripheral object following a small attentional focus appeared larger, without observation of the size-eccentricity effect. In contrast, a peripheral object appeared smaller following a large attentional focus in both larger and smaller judgement tasks. These results suggest that the relative size of the attentional focus has opposite effects on the perception of object size, independent of task type. Furthermore, in addition to the structural properties of the retina and the locus of attention, the size of attentional focus determines the extent to which an object appears smaller in the periphery. The present study complements the attentional attraction field model of the size and density of population receptive fields in V1 and further explains how the effect of attention is restricted by retinal structure.
大小-离心率效应是一种知觉扭曲现象，即位于外周的物体被知觉为比位于中央的物体小。尽管由注意力引起的物体表观大小增加已被记录，但对于不同大小的注意力焦点对物体外观的影响却知之甚少。本研究使用空间预线索范式，探究了不同大小的注意力焦点如何影响大小-离心率效应。此外，我们还考察了不同任务类型对大小知觉的影响。在较小的注意力焦点之后出现的外周物体显得更大，未观察到大小-离心率效应。相反，在大小判断任务中，无论是较大还是较小的任务，在较大的注意力焦点之后出现的外周物体都显得更小。这些结果表明，注意力焦点的相对大小对物体大小知觉有相反的影响，且与任务类型无关。此外，除了视网膜的结构特性和注意力的位置外，注意力焦点的大小还决定了物体在外周显得更小的程度。本研究补充了V1区群体感受野大小和密度的注意力吸引场模型，并进一步解释了注意力效应是如何受到视网膜结构限制的。
