The monocular-boundary-contour mechanism in binocular surface representation and suppression.
The monocular-boundary-contour mechanism in binocular surface representation and suppression.
复制标题
双目表面表示和抑制中的单眼边界轮廓机制。
作者：
vanBogaert,EricA;Ooi,TengLeng;He,ZijiangJ
边界轮廓对于表示双目表面，包括双目竞争中的表面是重要的。Ooi和He（2006，Perception 35581 -603）表明，具有由邻接光栅限定的边界轮廓的半图像在双眼竞争中占主导地位。我们调查了单眼边界轮廓机制，使用Kanizsa广场般的竞争显示器。在实验一中，左半图像的右边缘有一个垂直的错觉轮廓，而右半图像的左边缘有一个垂直的错觉轮廓。Kanizsa元件（圆盘和pacmen）填充有135°光栅，并放置在45°光栅背景上。融合时，观察者经历了一个强大的优势，感知一个虚幻的矩形前面的四个光盘。但是，当刺激通过以下方式进行操作时，这种竞争性的交替被取代了：（i）在两眼之间切换半图像，（ii）重新定位每个半图像中的pacmen以形成水平的错觉轮廓，或者（iii）将pacmen对角放置（从而消除每个单眼错觉轮廓）。这种强有力的竞争交替类似于当135°光栅盘与单独的135°光栅吃豆人在45°光栅背景上竞争时所经历的那些（实验2）。实验3表明，相对稳定的illusory-rectangle在实验1中的影响，在双眼的图像对齐，在一种方式与坚持在双目表面形成的遮挡约束。
Boundary contours are important for representing binocular surfaces, including those in binocular rivalry. Ooi and He (2006,Perception35581–603) showed that a half-image with a boundary contour defined by abutting gratings predominates in binocular rivalry. We investigated the monocular-boundary-contour mechanism using Kanizsa square-like rivalry displays. In experiment 1, the left half-image had a vertical illusory contour on the right edge while the right half-image had a vertical illusory contour on the left edge. The Kanizsa elements (discs and pacmen) were filled with a 135° grating and placed on a 45°-grating background. When fused, observers experienced a strong predominance for perceiving an illusory rectangle in front of four discs. But this percept was replaced by robust rivalry alternations when the stimulus was manipulated by (i) switching the half-images between eyes, (ii) relocating the pacmen in each half-image to form horizontal illusory contours, or (iii) placing the pacmen diagonally (thus eliminating each monocular illusory contour). Such robust rivalry alternations were similar to those experienced when a 135°-grating disc was in rivalry with a 135°-grating pacman alone on the 45°-grating background (experiment 2). Experiment 3 showed that the relatively stable illusory-rectangle percept in experiment 1 is affected by the alignment of the images in the two eyes, in a manner consistent with adherence to the occlusion constraint in binocular surface formation.