Su Yong R, He Zijiang J, Ooi Teng Leng
Department of Basic Sciences, Pennsylvania College of Optometry at Salus University, Elkins Park, PA 19027, USA.
Vision Res. 2011 Jun 1;51(11):1288-96. doi: 10.1016/j.visres.2011.04.005. Epub 2011 Apr 9.
We varied the surface boundary-contour properties of binocular rivalry (BR) stimuli to measure the rivalry percept as a function of stimulus duration. Experiment 1 compared perception from BR stimuli with monocular boundary contour (MBC) and binocular boundary contour (BBC). We found global dominance is achieved with stimulus duration as short as 30ms for the MBC rivalry stimuli, whereas it takes more than 150 ms for the BBC rivalry stimuli. This shows that global dominance can occur rapidly in the absence of a corresponding boundary contour in one half-image. Experiment 2 measured the detection of a monocular Gabor probe located centrally on a 1.5° versus 3.0° MBC rivalry stimulus. We found reliable binocular suppression is observed earlier with the 1.5° MBC stimulus, presumably because of the probe being spatially located nearer to the boundary contour. These findings, in conjunction with those in Su et al. (2011), support the notion that the representation of the dominant surface begins at the MBC and spreads toward the center of the image.
我们改变了双眼竞争（BR）刺激的表面边界轮廓属性，以测量作为刺激持续时间函数的竞争感知。实验1比较了BR刺激与单眼边界轮廓（MBC）和双眼边界轮廓（BBC）的感知情况。我们发现，对于MBC竞争刺激，刺激持续时间短至30毫秒就能实现全局优势，而对于BBC竞争刺激则需要超过150毫秒。这表明在一个半图像中没有相应边界轮廓的情况下，全局优势也能迅速出现。实验2测量了位于1.5°对3.0°MBC竞争刺激中心的单眼Gabor探针的检测情况。我们发现，1.5°MBC刺激能更早地观察到可靠的双眼抑制，推测是因为探针在空间上更靠近边界轮廓。这些发现，与Su等人（2011年）的研究结果相结合，支持了优势表面的表征始于MBC并向图像中心扩散的观点。
