Weiss Y, Adelson E H
Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge 02139, USA.
Perception. 2000;29(5):543-66. doi: 10.1068/p3032.
An ellipse rotating rigidly about its center may appear to rotate rigidly or to deform nonrigidly so that it appears gelatinous. We use this ambiguous stimulus to study how motion information is propagated across space. We find that features that are quite far from the contour of the ellipse may have a strong influence on the percept of the ellipse, provided they move in a way consistent with the motion of the ellipse. We show that the percept cannot be accounted for by computational models that pool constraints over a local area only, or by models that propagate information along contours, or by models that indiscriminately propagate information across space. However, the percept can be accounted for by a class of models that assume smoothness in a layered representation.
一个绕其中心刚性旋转的椭圆可能看起来是刚性旋转，也可能是非刚性变形，从而显得像凝胶状。我们利用这种具有歧义性的刺激来研究运动信息是如何在空间中传播的。我们发现，那些离椭圆轮廓相当远的特征可能会对椭圆的感知产生强烈影响，前提是它们的运动方式与椭圆的运动一致。我们表明，局部区域仅汇总约束的计算模型、沿轮廓传播信息的模型或在空间中无差别传播信息的模型都无法解释这种感知。然而，一类假设分层表示中具有平滑性的模型可以解释这种感知。
