Roudaia Eugenie, Bennett Patrick J, Sekuler Allison B
Department of Psychology, Neuroscience and Behaviour, McMaster University, Hamilton, ON, Canada.
Vision Res. 2008 Dec;48(28):2767-74. doi: 10.1016/j.visres.2008.07.026. Epub 2008 Nov 1.
Perception of global patterns requires the integration of local orientation information across space. The present study examined whether this integration ability declines in older age. We measured contrast thresholds for discriminating the global orientation of a "C" shaped contour against a blank background in younger and older subjects. Performance of younger subjects improved when the elements composing the "C" were aligned along the contour path, as opposed to being orthogonal to it or of mixed orientations. However, older subjects' performance was not affected by the orientation of the local elements. This indicates an age-related decline in contour integration.
对全局模式的感知需要整合跨空间的局部方向信息。本研究调查了这种整合能力在老年时是否会下降。我们测量了年轻和老年受试者在空白背景下辨别“C”形轮廓全局方向的对比度阈值。当构成“C”的元素沿轮廓路径对齐时，年轻受试者的表现有所改善，而不是与轮廓路径正交或呈混合方向。然而，老年受试者的表现不受局部元素方向的影响。这表明轮廓整合能力存在与年龄相关的下降。
