Hadad Bat-Sheva, Kimchi Ruth
University of Haifa, Haifa, Israel.
Percept Psychophys. 2008 Jul;70(5):818-27. doi: 10.3758/pp.70.5.818.
We examined time course of grouping of shape by perceptual closure in three experiments using a primed matching task. The gaps between the closure-inducing contours varied in size. In addition, depending on the distribution of the gaps along the closure-inducing contours--occurring at straight contour segments or at the point of change in contour direction--collinearity was either present or absent. In the absence of collinearity, early priming of the shape was observed for spatially close fragments, but not for spatially distant fragments. When collinearity was available, the shape of both spatially close and spatially distant fragments was primed at brief exposures. These results suggest that spatial proximity is critical for the rapid grouping of shape by perceptual closure in the absence of collinearity, but collinearity facilitates the rapid grouping of shape when the closure-inducing fragments are spatially distant. In addition, shape priming persisted over time only when the collinear fragments were spatially close, suggesting that a stable representation of shape depends both on collinearity and spatial proximity between the closure-inducing fragments.
我们在三个实验中使用启动匹配任务，研究了通过知觉闭合进行形状分组的时间进程。诱导闭合的轮廓之间的间隙大小各不相同。此外，根据间隙沿诱导闭合轮廓的分布情况——出现在直线轮廓段还是轮廓方向的变化点——共线性要么存在，要么不存在。在不存在共线性的情况下，对于空间上接近的片段，观察到形状的早期启动，但对于空间上遥远的片段则没有。当存在共线性时，在短暂曝光时，空间上接近和遥远的片段的形状都会被启动。这些结果表明，在不存在共线性的情况下，空间接近对于通过知觉闭合快速进行形状分组至关重要，但当诱导闭合的片段在空间上遥远时，共线性有助于形状的快速分组。此外，只有当共线片段在空间上接近时，形状启动才会随时间持续存在，这表明形状的稳定表征既取决于共线性，也取决于诱导闭合片段之间的空间接近度。
