Hess R F, Snowden R J
McGill Vision Research Center, Department of Ophthalmology, McGill University, Montreal, Canada.
Vision Res. 1992 Jan;32(1):47-59. doi: 10.1016/0042-6989(92)90112-v.
The temporal properties of the foveal visual filters were revealed using a method which is a variant on previously used noise masking paradigms. This enables the temporal properties of the mechanisms underlying threshold detection of a spatio-temporal probe to be measured. In accord with recent suggestions these results support the existence of three temporal mechanisms. The evidence for the third, higher temporal mechanism is only persuasive at low spatial frequencies. Furthermore, the results suggest that although there is some degree of spatio-temporal covariation in the filtering properties either of individual filters or across the filter population, the well known spatio-temporal covariation in human detection sensitivity is adequately explained by a sensitivity scaling of individual temporal filters with approximately invariant temporal properties.
使用一种对先前使用的噪声掩蔽范式进行了改进的方法，揭示了中央凹视觉滤波器的时间特性。这使得能够测量时空探测器阈值检测背后机制的时间特性。与最近的观点一致，这些结果支持存在三种时间机制。第三种更高时间机制的证据仅在低空间频率下有说服力。此外，结果表明，尽管在单个滤波器或整个滤波器群体的滤波特性中存在一定程度的时空协变，但人类检测灵敏度中众所周知的时空协变可以通过具有近似不变时间特性的单个时间滤波器的灵敏度缩放得到充分解释。
