Predictive Properties of Visual Adaptation
Predictive Properties of Visual Adaptation
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DOI：
10.1016/j.cub.2012.02.021
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发表时间：
2012-04-10
期刊：
影响因子：
9.2
通讯作者：
Mamassian, Pascal
中科院分区：
文献类型：
--
作者：
Chopin, Adrien;Mamassian, Pascal
人类的感知部分取决于他们之前的经历 [1, 2]。重复暴露于一种刺激后，适应以当前感知与最后显示的刺激之间负相关的形式发生[3-10]。先前的研究表明，这种负依赖性可以延续到过去几分钟[5,11,12]，但视觉依赖性的精确程度和性质仍然未知。在两个基于方向判断的实验中，我们揭示了视觉感知与过去远程呈现的刺激的正相关性，出乎意料地与最近已知的情况形成鲜明对比。先前的适应理论假设视觉系统试图相对于理想规范 [13, 14] 或最近的过去 [5, 7, 10, 15, 16] 进行自我校准。相反，我们建议使用遥远的过去来估计世界统计数据，并将该估计作为参考。根据这个新框架，适应是可预测的：最有可能即将出现的感知是帮助最近感知的统计数据与遥远的过去的统计数据相匹配的感知。
What humans perceive depends in part on what they have previously experienced [1, 2]. After repeated exposure to one stimulus, adaptation takes place in the form of a negative correlation between the current percept and the last displayed stimuli [3-10]. Previous work has shown that this negative dependence can extend to a few minutes in the past [5, 11, 12], but the precise extent and nature of the dependence in vision is still unknown. In two experiments based on orientation judgments, we reveal a positive dependence of a visual percept with stimuli presented remotely in the past, unexpectedly and in contrast to what is known for the recent past. Previous theories of adaptation have postulated that the visual system attempts to calibrate itself relative to an ideal norm [13, 14] or to the recent past [5, 7, 10, 15, 16]. We propose instead that the remote past is used to estimate the world's statistics and that this estimate becomes the reference. According to this new framework, adaptation is predictive: the most likely forthcoming percept is the one that helps the statistics of the most recent percepts match that of the remote past.