Spatiotemporal characteristics of dynamic feature binding in visual working memory
Spatiotemporal characteristics of dynamic feature binding in visual working memory
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DOI：
10.1016/s0042-6989(03)00331-6
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发表时间：
2003-09-01
期刊：
影响因子：
1.8
通讯作者：
Saiki, J
中科院分区：
文献类型：
--
作者：
Saiki, J
有人提出，视觉工作记忆可以保存一组四到五个连贯的对象表征。作为对这个建议的测试，我设计了一个称为多对象持久性跟踪（MOPT）的范例，它测量动态情况下功能位置绑定的内存。观察者被要求在一个遮挡物后面有多个物体的图案的常规旋转中间检测任何特征切换。随着图案旋转速度的增加，特征切换检测性能急剧下降。使用多种颜色形状连接的行为证据仅在物体静止时观察到。这些结果对视觉工作记忆的功能单元涉及连贯的对象表征的观点提出了质疑，其中对象特征是紧密结合和动态更新的。(C) 2003 Elsevier Ltd.版权所有。
It has been proposed that visual working memory can hold a set of four to five coherent object representations. As a test of this proposal, I devised a paradigm called multiple object permanence tracking (MOPT) that measures memory for feature-location binding in dynamic situations. Observers were asked to detect any feature switch in the middle of a regular rotation of a pattern with multiple objects behind an occluder. The feature switch detection performance dramatically declined as the pattern rotation velocity increased. The behavioral evidence for the use of multiple color shape conjunction was observed only when the objects were stationary. These results cast doubt on the view that the functional unit of visual working memory involves coherent object representation, where object features are tightly bound and dynamically updated. (C) 2003 Elsevier Ltd. All rights reserved.