Joosten Eva R M, Collins Thérèse
Université Paris Descartes, Sorbonne Paris Cité, Paris, France.
CNRS (Laboratoire Psychologie de la Perception, UMR 8242), Paris, France.
J Vis. 2018 Mar 1;18(3):10. doi: 10.1167/18.3.10.
The phenomenon of visual stability is classically explained by an internal forward model predicting the sensory consequences of an eye movement based on efference copy. However, this model cannot explain why some object displacements go undetected, a phenomenon that may depend on a passive prior belief that the world is stable. With reverse correlation, we investigated saccadic suppression of displacement and found that transsaccadic correspondence operates differently depending on the position of the postsaccadic visual target relative to the primary landing position; when the signal falls within the extent of primary saccadic scatter, observers are less able to remap accurately. Furthermore, we observed that the neural representations driving perceptual and saccadic decisions are similar when saccading to a target, but that the representations driving transsaccadic correspondence are different from those driving secondary saccades.
视觉稳定性现象传统上是由一种基于传出副本预测眼动感觉后果的内部前向模型来解释的。然而，该模型无法解释为什么有些物体位移未被察觉，这种现象可能取决于世界是稳定的这种被动先验信念。通过反向关联，我们研究了位移的扫视抑制，发现跨扫视对应根据扫视后视觉目标相对于主要着陆位置的位置而有所不同；当信号落在主要扫视散布范围内时，观察者准确重新映射的能力就会降低。此外，我们观察到，向目标扫视时驱动感知和扫视决策的神经表征是相似的，但驱动跨扫视对应的表征与驱动二次扫视的表征不同。
