Freeman Elliot D, Driver Jon
UCL Institute of Cognitive Neuroscience and Department of Psychology, University College London, 17 Queen Square, London, UK.
Vision Res. 2006 Nov;46(23):4007-23. doi: 10.1016/j.visres.2006.07.008. Epub 2006 Sep 25.
Two ambiguous transparent structure-from-motion (SFM) stimuli often appear to co-rotate. Grossmann & Dobbins (2003) reported breakdown of such perceptual coupling when one stimulus was made unambiguous (by rendering it opaque), leading them to propose that coupling depends generally on differential stimulus ambiguity. In contrast, we demonstrate robust stimulus-driven coupling even when one SFM stimulus is relatively disambiguated, by using relative-luminance and/or binocular-disparity cues. Such context stimuli could induce stimulus-driven coupling by disambiguating the transparent stimulus, though critically only when the context was clearly non-opaque and coaxial with the ambiguous stimulus. This demonstrates long-range information-sharing between separate stimulus representations, subject to specific constraints.
两个模糊的透明运动结构（SFM）刺激通常看起来会共同旋转。格罗斯曼和多宾斯（2003年）报告称，当其中一个刺激变得明确（通过使其不透明）时，这种感知耦合就会瓦解，这使他们提出耦合通常取决于刺激的差异模糊性。相比之下，我们通过使用相对亮度和/或双眼视差线索，证明即使一个SFM刺激相对明确，也会有强大的刺激驱动耦合。这种背景刺激可以通过消除透明刺激的模糊性来诱导刺激驱动耦合，但关键在于只有当背景明显不透明且与模糊刺激同轴时才会如此。这表明在单独的刺激表征之间存在远程信息共享，但受到特定约束。
