Adaptation to numerosity requires only brief exposures, and is determined by number of events, not exposure duration.
Adaptation to numerosity requires only brief exposures, and is determined by number of events, not exposure duration.
复制标题
DOI：
10.1167/16.10.22
复制
发表时间：
2016-08-01
影响因子：
1.8
通讯作者：
Burr D
中科院分区：
文献类型：
--
作者：
Aagten-Murphy D;Burr D
暴露在网点补丁中会在随后观察到的网点补丁的感知数量中产生排斥性的移动。虽然这是一种非常强烈的效应，其中感知到的数字可以移动到实际数字的50%，但人们对时间动力学知之甚少。在这里，我们展示了一种新的适应范式，它允许在几个不同的位置同时快速地诱导数量适应。我们表明，这种对数量的适应不仅在空间上是特定的，视野的不同位置能够适应高、低或中性刺激，而且它可以只发生在非常短的适应时期。进一步的研究表明，适应效应主要是由已经发生的独特适应事件的数量驱动的，而不是由每个事件的持续时间或对适应刺激的暴露的总持续时间驱动的。这种基于事件的数量适应似乎很好地符合适应的统计模型，在该模型中，知觉经验的动态调整基于刺激的先前经验和当前知觉，以优化有限的知觉工作范围。这些结果暗示了数字知觉的高度可塑性机制，这种机制依赖于离散适应事件的数量，也证明了一种适合于考察适应的时间属性的快速而有效的范式。
Exposure to a patch of dots produces a repulsive shift in the perceived numerosity of subsequently viewed dot patches. Although a remarkably strong effect, in which the perceived numerosity can be shifted by up to 50% of the actual numerosity, very little is known about the temporal dynamics. Here we demonstrate a novel adaptation paradigm that allows numerosity adaptation to be rapidly induced at several distinct locations simultaneously. We show that not only is this adaptation to numerosity spatially specific, with different locations of the visual field able to be adapted to high, low, or neutral stimuli, but it can occur with only very brief periods of adaptation. Further investigation revealed that the adaptation effect was primarily driven by the number of unique adapting events that had occurred and not by either the duration of each event or the total duration of exposure to adapting stimuli. This event-based numerosity adaptation appears to fit well with statistical models of adaptation in which the dynamic adjustment of perceptual experiences, based on both the previous experience of the stimuli and the current percept, acts to optimize the limited working range of perception. These results implicate a highly plastic mechanism for numerosity perception, which is dependent on the number of discrete adaptation events, and also demonstrate a quick and efficient paradigm suitable for examining the temporal properties of adaptation.