Hussain Ismail Ahamed Miflah, Solomon Joshua A, Hansard Miles, Mareschal Isabelle
Department of Experimental Psychology, School of Biological and Chemical Sciences , Queen Mary University of London , London , UK.
Centre for Applied Vision Research City , University of London , London , UK.
R Soc Open Sci. 2016 Nov 23;3(11):160551. doi: 10.1098/rsos.160551. eCollection 2016 Nov.
The tilt after-effect (TAE) is thought to be a manifestation of gain control in mechanisms selective for spatial orientation in visual stimuli. It has been demonstrated with luminance-defined stripes, contrast-defined stripes, orientation-defined stripes and even with natural images. Of course, all images can be decomposed into a sum of stripes, so it should not be surprising to find a TAE when adapting and test images contain stripes that differ by 15° or so. We show this latter condition is not necessary for the TAE with natural images: adaptation to slightly tilted and vertically filtered houses produced a 'repulsive' bias in the perceived orientation of horizontally filtered houses. These results suggest gain control in mechanisms selective for spatial orientation in natural images.
倾斜后效（TAE）被认为是视觉刺激中空间方向选择性机制中增益控制的一种表现。它已通过亮度定义的条纹、对比度定义的条纹、方向定义的条纹甚至自然图像得到证实。当然，所有图像都可以分解为条纹的总和，因此当适应图像和测试图像包含相差约15°的条纹时发现倾斜后效就不足为奇了。我们表明，对于自然图像的倾斜后效，后一种情况并非必要：适应轻微倾斜并垂直滤波的房屋会在水平滤波房屋的感知方向上产生“排斥性”偏差。这些结果表明自然图像中空间方向选择性机制存在增益控制。
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