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1. chinaXiv:202103.00127 [pdf]


李华云; 李箐; 郝泽奇
Subjects: Psychology >> Experimental Psychology

Panum极限情况是单眼性区域中最简单的一种现象,它是研究单眼遮挡区域形成立体视觉机制的突破口。本文对Panum 极限情况关于深度起源问题存在的争议,展开深入的研究。实验采用固定注视点位置和快速呈现刺激的方式,考察被试是否可以正确知觉注视特征和非注视特征的深度,并考察被试知觉到的深度是否来自深度对比。结果表明,无论是在Panum刺激条件下还是在控制刺激条件下,被试都能够正确地知觉到注视特征和非注视特征的深度,且被试在双眼融合后所知觉到的两个特征的深度并非来自深度对比,这说明Panum极限情况的深度知觉机制更可能为双重融合。

submitted time 2021-03-19 Hits1315Downloads661 Comment 0

2. chinaXiv:202103.00118 [pdf]

The effect of perceptual learning on the sensitivity and stability of double fusion in Panum’s Limiting Case

Yuyu Shi; Yanyan Gao; Jing Ren; Ashley Chung-Fat-Yim; Huayun Li; Xize Jia
Subjects: Psychology >> Experimental Psychology

Panum’s limiting case is a typical phenomenon of monocular occlusion in binocular vision. It occurs naturally when one object is occluded by another object for one eye, but in the other eye the two objects are located in different directions. Only recently has it been found that in addition to horizontal disparity, the vertical disparity gradient and cue conflict are two important determinants for double fusion. Therefore, the current study aims to determine the relationship between the two determinants and perceptual learning in Panum’s limiting case. Twenty-six observers were trained for five days. Meanwhile, the RTs and duration of double fusion was measured when the participants viewed several versions of Panum’s configuration. In these stimuli, vertical disparity gradient was varied from 0.1 to 0.6 and cue conflict was manipulated from low to high. The results revealed that for each level of these factors, the RTs of double fusion decreased and the duration of double fusion increased with each training session. Moreover, there were significant differences among different levels of vertical disparity gradient and cue conflict. Lastly, there was also a significant interaction effect between the two determinants in Panum’s limiting case. These results suggest that there is perceptual learning for each level of the two determinants in monocular occlusion and these factors jointly affect the sensitivity and stability of double fusion.

submitted time 2021-03-08 Hits3958Downloads745 Comment 0

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