Dissociation of perceived size and perceived strength in the scintillating grid illusion
Dissociation of perceived size and perceived strength in the scintillating grid illusion
复制标题
闪烁网格错觉中感知大小和感知强度的分离
DOI：
10.1167/19.13.15
复制
发表时间：
2019
影响因子：
1.8
通讯作者：
Sato Yuka
中科院分区：
文献类型：
--
作者：
Matsuno Toyomi;Sato Yuka
闪烁网格错觉是一种几何视觉错觉，其中在位于网格图案交叉点的白色圆形斑块上感知到虚幻的黑点。之前的研究通过不同的刺激和观看条件来测量幻觉斑点的感知强度，以阐明幻觉背后的机制。然而，调查结果仍无定论。在本研究中，我们通过改变几何组件的大小和刺激的方向，除了测量幻觉点的感知强度之外，还测量了幻觉点的感知大小，以进一步研究这种幻觉背后的机制。我们发现感知光斑大小对刺激参数变化的依赖性与感知光斑强度的依赖性无关。幻觉斑点的感知大小与白色斑块的大小线性相关，并且较少依赖于网格条的宽度和刺激的方向，而感知强度的特征在于与斑块大小和条宽度的二次关系，并且根据刺激的方向进行单调调制。这些结果表明，不同的因素分别限制了引起幻觉斑点的过程中的大小和强度。我们提出，闪烁网格错觉的机制是基于灰条方向信号的干扰对白斑表面形成过程的中断。
The scintillating grid illusion is a geometric visual illusion where illusory dark spots are perceived on white circular patches that are located at the intersections of a grid pattern. Previous studies have measured the perceived strength of the illusory spots by varying stimulus and viewing conditions, to elucidate the mechanisms underlying the illusion; however, findings remain inconclusive. In the present study, we measured the perceived size of the illusory spots, in addition to their perceived strength, by varying the size of the geometric components and the orientation of the stimulus, to further investigate the mechanism behind this illusion. We found that the dependency of perceived spot size on the change of the stimulus parameters is dissociated from that of the perceived spot strength. The perceived size of the illusory spots linearly correlated with the size of the white patches and was less dependent on the width of the grid bars and the orientation of the stimulus, while the perceived strength was characterized by a quadratic relationship with patch size and bar width and was monotonically modulated depending on the orientation of the stimuli. These results suggest that different factors separately constrain size and strength within the processes that elicit the illusory spots. We propose that the mechanism underlying the scintillating grid illusion is based on the interruption of the surface formation process of white patches by the interference of the orientation signals of gray bars.