Information processing correlates of a size-contrast illusion.
Information processing correlates of a size-contrast illusion.
复制标题
DOI：
10.3389/fpsyg.2014.00142
复制
发表时间：
2014
影响因子：
3.8
通讯作者：
Gold JM
中科院分区：
文献类型：
--
作者：
Gold JM
感知常常受到上下文的影响。一类众所周知的感知情境效应是感知对比错觉，其中邻近的刺激区域相互作用以改变各种刺激属性的感知，例如感知的亮度、颜色和大小。尽管对比效应的现象现实已有充分记录，但在许多情况下，这些错觉与感知系统如何处理信息之间的联系尚不清楚。在这里，我们使用噪声作为工具来探索这种对比效应的信息处理相关性：艾宾浩斯-蒂钦纳尺寸对比错觉。在这种错觉中，中心点的感知尺寸会被一组周围点的尺寸显着改变，使得较大的周围点的存在往往会减小中心点的感知尺寸（反之亦然）。在我们的实验中，我们首先复制了先前的结果，这些结果证明了艾宾浩斯-铁钦纳错觉的主观现实。然后，我们在检测任务中使用视觉噪声来探究观察者在体验幻觉时处理信息的方式。通过将噪声与观察者的分类决策相关联，我们发现周围上下文元素的大小对分配给中心元素内部和周围区域的观察者的相对权重有直接影响。具体来说，在存在较小的周围上下文元素的情况下，观察者向周围区域分配相对较多的权重，而向中心区域分配相对较小的权重。这些结果为尺寸对比错觉的主观体验与其相关的信息处理相关性之间的联系提供了新的见解。
Perception is often influenced by context. A well-known class of perceptual context effects is perceptual contrast illusions, in which proximate stimulus regions interact to alter the perception of various stimulus attributes, such as perceived brightness, color and size. Although the phenomenal reality of contrast effects is well documented, in many cases the connection between these illusions and how information is processed by perceptual systems is not well understood. Here, we use noise as a tool to explore the information processing correlates of one such contrast effect: the Ebbinghaus–Titchener size-contrast illusion. In this illusion, the perceived size of a central dot is significantly altered by the sizes of a set of surrounding dots, such that the presence of larger surrounding dots tends to reduce the perceived size of the central dot (and vise versa). In our experiments, we first replicated previous results that have demonstrated the subjective reality of the Ebbinghaus–Titchener illusion. We then used visual noise in a detection task to probe the manner in which observers processed information when experiencing the illusion. By correlating the noise with observers' classification decisions, we found that the sizes of the surrounding contextual elements had a direct influence on the relative weight observers assigned to regions within and surrounding the central element. Specifically, observers assigned relatively more weight to the surrounding region and less weight to the central region in the presence of smaller surrounding contextual elements. These results offer new insights into the connection between the subjective experience of size-contrast illusions and their associated information processing correlates.