Serial dependence for oculomotor control depends on early sensory signals
Serial dependence for oculomotor control depends on early sensory signals
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DOI：
10.1016/j.cub.2022.05.011
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发表时间：
2022-07-11
期刊：
影响因子：
9.2
通讯作者：
Stewart, Emma E. M.
中科院分区：
文献类型：
--
作者：
Goettker, Alexander;Stewart, Emma E. M.
为了建立对世界的准确感知，视觉系统依赖于过去的经验和先前的假设。(1)例如，尽管一个物体在深度上移动的视网膜投影发生了巨大变化，但我们仍然以恒定的大小和速度感知该物体。(2，3)因此，如果我们看到同一物体在两个不同的深度水平上具有恒定的视网膜大小，则感知的大小不同(如庞佐错觉所示)。过去的经验也直接影响知觉判断，这是一种被称为连续依赖的效应。(4，5)这种顺序效应也被报道对动眼行为，甚至在逐个试验的水平上也是如此。(6-)(10)在一个充满统计规律的世界里，整合过去的经验似乎是减少不确定性和改善行为的一种聪明而复杂的机制。通过利用庞佐错觉将感知的大小和速度从视网膜信号中分离出来，我们证明了眼动控制的系列依赖效应是由视网膜错误信号介导的。这些顺序效应很可能发生在早期的感觉加工中，因为它们转移到不同的视觉刺激。与最近报道的知觉决定的历史效应相反，(11)眼动控制的顺序效应通过不整合空间背景和忽略大小和速度恒定而偏离知觉机制。尽管这种分离可能看起来不是最理想的，但我们认为这种效应揭示了动眼系统和知觉系统的不同目标。眼球运动系统试图减少视网膜错误信号，使目标靠近中心凹，而视觉系统解释视网膜输入，以实现对世界的准确呈现。
To create an accurate percept of the world, the visual system relies on past experience and prior assumptions.(1) For example, although the retinal projection of an object moving in depth changes drastically, we still perceive the object at a constant size and velocity.(2,3 )Consequently, if we see the same object with a constant retinal size at two different depth levels, the perceived size differs (illustrated by the Ponzo illusion). Past experience also directly influences perceptual judgments, an effect known as serial dependence.(4,5) Such sequential effects have also been reported for oculomotor behavior, even on the trial-bytrial level.(6-)(10) An integration of past experiences seems like a smart and sophisticated mechanism to reduce uncertainty and improve behavior in a world full of statistical regularities. By leveraging the Ponzo illusion to dissociate perceived size and speed from retinal signals, we show that serial-dependence effects for oculomotor control are mediated by retinal error signals. These sequential effects likely take place in early sensory processing because they transfer to different visual stimuli. In contrast to recently reported history effects for perceptual decisions,(11) sequential effects for oculomotor control deviate from perceptual mechanisms by not integrating spatial context and by ignoring size and velocity constancy. Although this dissociation might appear suboptimal, we argue that this effect reveals the different goals of the oculomotor and perceptual systems. The oculomotor system tries to reduce retinal error signals to bring and keep the target close to the fovea, whereas the visual system interprets retinal input to achieve an accurate representation of the world.(12)