Investigations of the “fat-face” illusion have unanimously agreed that the illusion is face-specific. Here, we offer several manipulations to highlight that the fat-face illusion is not restricted to the bottom image, isn’t a property of internal features, facial contour/texture, and in general isn’t even specific to faces. We propose the axis of horizontal asymmetry account to contextualize fat-face illusion as a geometry-led illusion.

中文翻译：

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解释胖脸错觉的几何解释

对“胖脸”错觉的调查一致认为，这种错觉是针对面部的。在这里，我们提供了几种操作来强调，胖脸错觉并不局限于底部图像，不是内部特征、面部轮廓/纹理的属性，而且通常甚至不是特定于面部的。我们提出水平不对称轴的解释，将胖脸错觉作为几何主导的错觉。