Castet E
Laboratoire de Psychologie Expérimentale, Université René Descartes, CNRS, Paris, France.
Vision Res. 1994 Aug;34(16):2103-14. doi: 10.1016/0042-6989(94)90320-4.
The persistence of briefly flashed stimuli undergoing a horizontal apparent motion is assessed as a function of the temporal interval (inter-stimulus interval or ISI) between successive locations. The main result is that the duration of persistence is increased when the ISI is reduced (within the range 1-15 msec). An increase of persistence also occurs when the spatial separation (delta chi) between successive presentations of the moving stimulus becomes larger, a well established result which is replicated here. In both cases, the elevation of persistence suggests that inhibitory processes, which are assumed to underlie the persistence-suppression, have become less efficient. According to the data, it seems that the spatio-temporal parameters of motion, and not the speed as such, are responsible for the strength of inhibition. Namely, optimal inhibition, and thus suppression, would need a minimum amount of time to take place, and would improve with proximity (i.e. with smaller delta chi). Finally, a persistence-suppression decrease is observed when the angular size of the flashed stimuli is reduced (i.e. when higher spatial frequencies become more predominant). A model of transient-on-sustained inhibition accounts well for these results.
对经历水平视错觉运动的短暂闪烁刺激的持续性进行评估，该持续性是连续位置之间时间间隔（刺激间隔或ISI）的函数。主要结果是，当ISI减小（在1 - 15毫秒范围内）时，持续性的持续时间会增加。当移动刺激的连续呈现之间的空间间隔（δχ）变大时，持续性也会增加，这是一个已得到充分证实的结果，在此得到了重复验证。在这两种情况下，持续性的提高表明，被认为是持续性抑制基础的抑制过程效率变低了。根据数据，似乎运动的时空参数，而非速度本身，决定了抑制的强度。也就是说，最佳抑制，进而抑制作用，需要最少的时间来发生，并且会随着接近程度（即较小的δχ）而增强。最后，当闪烁刺激的视角尺寸减小时（即当更高的空间频率变得更占主导时），观察到持续性抑制减弱。一个瞬态 - 持续抑制模型很好地解释了这些结果。
