Yeshurun Y, Carrasco M
Department of Psychology, New York University, New York, New York 10003, USA.
Nat Neurosci. 2000 Jun;3(6):622-7. doi: 10.1038/75804.
Cuing covert spatial attention can increase spatial resolution. Here we pinpointed the specific locus of this effect using texture segmentation. At the level of visual cortex, texture segmentation theoretically involves passage of visual input through two layers of spatial linear filters separated by a pointwise nonlinearity. By manipulating the textures to differentially stimulate first- or second-order filters of various scales, we showed that the attentional effect consistently varied with the latter. These psychophysical results further support the hypothesis that attention increases resolution at the attended location and are consistent with an effect of attention at stages as early as the primary visual cortex.
提示隐蔽的空间注意力可以提高空间分辨率。在这里，我们使用纹理分割来确定这种效应的具体位置。在视觉皮层水平，纹理分割理论上涉及视觉输入通过两层由逐点非线性分隔的空间线性滤波器。通过操纵纹理以不同方式刺激各种尺度的一阶或二阶滤波器，我们发现注意力效应始终随后者而变化。这些心理物理学结果进一步支持了注意力提高被注意位置分辨率的假设，并且与早在初级视觉皮层阶段的注意力效应一致。
