Bridgeman B, Leff S
J Exp Psychol Hum Percept Perform. 1979 Feb;5(1):101-9. doi: 10.1037//0096-1523.5.1.101.
Metacontrast masking occurs both at the fovea and in the retinal periphery; foveally, the smallest stimulus elicited the strongest masking, whereas peripherally the reverse was the case. An analysis of variance showed a significant size effect, eccentricity effect, and size-eccentricity interaction. As stimulus size increased, the stimulus onset asynchrony of maximum masking shifted to greater values. Both foveal metacontrast and peak shifts contradicted predictions made by the hypothesis that metacontrast is mediated by an interaction of sustained and transient channels in the visual system. The data are consistent, however, with a lateral inhibitory model of metacontrast masking and stimulus coding.
后对比掩蔽现象既发生在中央凹，也出现在视网膜周边区域；在中央凹，最小的刺激引发最强的掩蔽效应，而在周边区域情况则相反。方差分析显示出显著的大小效应、离心率效应以及大小 - 离心率交互作用。随着刺激大小增加，最大掩蔽时的刺激起始异步性向更大的值偏移。中央凹后对比和峰值偏移均与视觉系统中后对比由持续通道和瞬态通道相互作用介导这一假设所做的预测相矛盾。然而，这些数据与后对比掩蔽和刺激编码的侧向抑制模型是一致的。
