He Tao, Fritsche Matthias, de Lange Floris P
Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, the Netherlands.
J Vis. 2018 Dec 3;18(13):20. doi: 10.1167/18.13.20.
Visual stability is thought to be mediated by predictive remapping of the relevant object information from its current, presaccadic location to its future, postsaccadic location on the retina. However, it is heavily debated whether and what feature information is predictively remapped during the presaccadic interval. Here we examined the spatial and featural properties of predictive remapping in a set of three psychophysical studies. We made use of an orientation-adaptation paradigm, in which we induced a tilt aftereffect by prolonged exposure to an oriented adaptor stimulus. Following this adaptation phase, a test stimulus was presented shortly before saccade onset. We found strong evidence for predictive remapping of the features of this test stimulus presented shortly before saccade onset, evidenced by a large tilt aftereffect elicited when the adaptor was positioned at the postsaccadic retinal location of the test stimulus. Conversely, the adaptation state itself, caused by the exposure to the adaptor stimulus, was not predictively remapped. Furthermore, we establish that predictive remapping also occurs for stimuli that are not saccade targets, pointing toward a forward remapping process operating across the whole visual field. Together, our findings suggest that predictive feature remapping of object information plays an important role in mediating visual stability.
视觉稳定性被认为是通过将相关物体信息从其当前的扫视前位置预测性地重映射到视网膜上其未来的扫视后位置来介导的。然而，在扫视前间隔期间是否以及何种特征信息被预测性地重映射存在激烈争论。在这里，我们在一组三项心理物理学研究中检验了预测性重映射的空间和特征属性。我们利用了一种方向适应范式，其中通过长时间暴露于定向的适应刺激来诱导倾斜后效。在这个适应阶段之后，在扫视开始前不久呈现一个测试刺激。我们发现了强有力的证据，表明在扫视开始前不久呈现的这个测试刺激的特征被预测性地重映射，这由当适应刺激位于测试刺激的扫视后视网膜位置时引发的大倾斜后效所证明。相反，由暴露于适应刺激引起的适应状态本身并未被预测性地重映射。此外，我们确定对于不是扫视目标的刺激也会发生预测性重映射，这表明存在一个在整个视野中起作用的向前重映射过程。总之，我们的研究结果表明，物体信息的预测性特征重映射在介导视觉稳定性方面起着重要作用。
