BINOCULAR COMBINATION OF CONTRAST SIGNALS
BINOCULAR COMBINATION OF CONTRAST SIGNALS
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DOI：
10.1016/0042-6989(89)90060-6
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发表时间：
1989-01-01
期刊：
影响因子：
1.8
通讯作者：
MOVSHON, JA
中科院分区：
文献类型：
--
作者：
ANDERSON, PA;MOVSHON, JA
我们研究了二元呈现的垂直光栅图案的可探测性，该图案在呈现给两只眼睛的对比度比中变化。所得阈值数据落在由指数接近2的幂和方程很好地描述的双眼求和轮廓上。我们研究了在光栅图案中加入一维视觉噪声的效果，无论是眼睛之间相关的还是不相关的。不相关噪声的加入均匀地提高了所有眼间比的阈值，而相关噪声提高了比其他刺激阈值高1左右的刺激阈值。我们还研究了单眼适应的影响，以一个高对比度光栅的形式的总和轮廓。这种适应使阈值以一种随测试目标的眼间对比度持续变化的方式升高，并增加双眼总和的量。目前的几种模型中的每一种都可以解释我们的一些结果，但似乎没有一种模型能够解释所有三组数据。因此，我们开发了一种新的多通道，它们对两个单目输入的灵敏度不同。该模型可以解释我们的数据和其他关于双眼汇总、掩蔽、适应和眼间转移的数据。我们得出结论，在人类系统中存在一个眼优势通道系统。
We studied the detectability of dichoptically presented vertical grating patterns that varied in the ratio of the contrasts presented to the two eyes The resulting threshold data fall on a binocular summation contour well described by a power summation equation with an exponent near 2. We studied the effect of adding one-dimensional visual noise, either correlated or uncorrelated between the eyes, to the grating patterns. The addition of uncorrelated noise elevated threshold uniformly for all interocular ratios, while correlated noise elevated thresholds for stimuli whose ratios were near 1 more than thresholds for other stimuli. We also examined the effects of monocular adaptation to a high-contrast grating on the form of the summation contour. Such adaptation elevates threshold in a manner that varies continously with the interocular contrast ration of the test targets, and increases the amount of binocular summation. Each of several current models can explain some of our results, but no one of them seems capable of accounting for all three sets of data. We therefore develop a new multiple-channels that vary in their sensitivities to the two monocular inputs. This model can account for our data and those of others concerning binocular summation, masking, adaptation and interocular transfer. We conclude that there exists a system of ocular dominance channels in the human system.