Location-Unbound Color-Shape Binding Representations in Visual Working Memory
Location-Unbound Color-Shape Binding Representations in Visual Working Memory
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DOI：
10.1177/0956797615616797
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发表时间：
2016-02
影响因子：
8.2
通讯作者：
J. Saiki
中科院分区：
文献类型：
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作者：
J. Saiki
非空间特征（如颜色和形状）在视觉工作记忆中的结合机制，以及这些特征的位置在其结合中的作用，仍然是未知的。在当前的研究中，我修改了冗余增益范式来调查这些问题。一组功能是在一个两个对象的内存显示，其次是一个单一的对象探针。参与者判断探针是否包含记忆显示的任何特征，无论其位置如何。响应时间分布显示功能共激活，只有当一个单一的对象在内存显示的功能出现在一起的探头，无论响应时间的探头和内存对象共享相同的位置受益。这一发现表明，一个共享的位置是必要的，在形成的约束表示，但不必要的维护。脑电图数据显示，振幅调制反映的位置未绑定的功能协同激活是不同的，从那些反映的位置共享的好处，与行为发现，功能位置绑定是不必要的颜色形状绑定的维护。
The mechanism by which nonspatial features, such as color and shape, are bound in visual working memory, and the role of those features’ location in their binding, remains unknown. In the current study, I modified a redundancy-gain paradigm to investigate these issues. A set of features was presented in a two-object memory display, followed by a single object probe. Participants judged whether the probe contained any features of the memory display, regardless of its location. Response time distributions revealed feature coactivation only when both features of a single object in the memory display appeared together in the probe, regardless of the response time benefit from the probe and memory objects sharing the same location. This finding suggests that a shared location is necessary in the formation of bound representations but unnecessary in their maintenance. Electroencephalography data showed that amplitude modulations reflecting location-unbound feature coactivation were different from those reflecting the location-sharing benefit, consistent with the behavioral finding that feature-location binding is unnecessary in the maintenance of color-shape binding.