The relationship between temporal integration and persistence.
The relationship between temporal integration and persistence.
复制标题
时间整合与持久性之间的关系。
DOI：
10.1016/0042-6989(83)90022-6
复制
发表时间：
1983
期刊：
影响因子：
1.8
通讯作者：
May,JG
中科院分区：
文献类型：
--
作者：
Marx,MS;May,JG
我们测量了三种不同空间频率光栅的持久性，在它们被等同于可见性之后，通过操作：(1)刺激的对比度，(2)刺激的持续时间，或(3)对比度和持续时间。当我们呈现相同视对比度和相同持续时间的光栅时，持久性随空间频率的增加而增加。当视对比度与长时间或短时间对比度灵敏度相等时，这种效应就会发生。然而，当我们使用与时间积分相等的光栅（即相同的视对比度但不相等的持续时间）来检查持久性时，没有观察到持久性作为空间频率函数的差异。因此，通常在更高的空间频率中发现的持久性的增加可以通过对视觉系统时空特征的了解来解释。根据不同空间通道的不同滤波时间常数的概念讨论了我们的发现。
We measured the persistence for gratings of three different spatial frequencies after they had been equated for visibility by manipulating: (1) the contrast of the stimulus, (2) the duration of the stimulus, or (3) both contrast and duration. When we presented gratings of equal apparent contrast and equal duration, persistence increased with increasing spatial frequency. This effect occurred when apparent contrast was equated in terms of extended-duration or brief duration contrast sensitivity. However, when we examined persistence using gratings equated for temporal integration (i.e. equal apparent contrast but unequal durations), no differences in persistence as a function of spatial frequency were observed. Thus, the increase in persistence which is typically found with higher spatial frequencies can be accounted for by knowledge of the spatio-temporal characteristics of the visual system. Our findings are discussed in terms of the notion of different filter time-constants for different spatial channels.