Bulatov Aleksandr, Bulatova Natalija, Surkys Tadas
Institute of Biological Systems and Genetics Research, Lithuanian University of Health Sciences, Mickevičiaus 9, LT-44307 Kaunas, Lithuania.
Vision Res. 2012 Oct 15;71:1-9. doi: 10.1016/j.visres.2012.08.010. Epub 2012 Aug 23.
It has been demonstrated in previous studies that the illusions of extent of the Brentano type can be explained by the perceptual positional shifts of the stimulus terminators in direction of the centers-of-masses (centroids) of adjacent contextual flanks [Bulatov, A. et al. (2011). Contextual flanks' tilting and magnitude of illusion of extent. Vision Research, 51(1), 58-64]. In the present study, the applicability of the centroid approach to explain the right-angle misjudgments was tested psychophysically using stimuli composed of three small disks (dots) forming an imaginary rectangular triangle. Stimuli comprised the Müller-Lyer wings or line segments (bars) as the contextual distracters rotated around the vertices of the triangle, and changes in the magnitude of the illusion of perpendicularity were measured in a set of experiments. A good resemblance between the experimental data and theoretical predictions obtained strongly supports the suggestion regarding the common "centroid" origin of the illusions of extent of the Brentano type and misperception of the perpendicularity investigated.
先前的研究已经表明，布伦塔诺类型的范围错觉可以通过刺激终止点在相邻背景侧翼质心方向上的感知位置偏移来解释[布拉托夫，A.等人（2011年）。背景侧翼的倾斜与范围错觉的大小。视觉研究，51(1)，58 - 64]。在本研究中，使用由三个小圆盘（点）组成的虚构直角三角形的刺激，通过心理物理学测试了质心方法解释直角误判的适用性。刺激包括缪勒 - 莱尔翼或线段（条）作为围绕三角形顶点旋转的背景干扰物，并在一组实验中测量了垂直度错觉大小的变化。实验数据与所获得的理论预测之间的良好相似性有力地支持了关于布伦塔诺类型范围错觉和所研究的垂直度误感知具有共同“质心”起源的建议。
