Limitations of object-based feature encoding in visual short-term memory.
Limitations of object-based feature encoding in visual short-term memory.
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DOI：
10.1037/0096-1523.28.2.458
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发表时间：
2002-04
期刊：
影响因子：
--
通讯作者：
Yaoda Xu
中科院分区：
文献类型：
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作者：
Yaoda Xu
本研究以同一维度内同一物体不同部位的两个特征为研究对象，考察了视觉短时记忆中基于物体的特征编码。使用变化检测范式，本实验研究了两种颜色的物体和两种取向的物体。参与者发现，即使在适当控制决策噪音的情况下，监控这类对象的1个特征也比同时监控这两个特征更容易。然而，没有观察到对相同维度的每个对象的两个特征进行编码的基于对象的好处。当使用相似的刺激，但每个对象的两个特征来自不同的维度(颜色和方向)时，观察到基于对象的益处。这些结果表明，只有来自不同维度的特征才能从基于对象的编码中受益，从而对基于对象的特征编码理论施加了很大的限制。
The present study investigated object-based feature encoding in visual short-term memory for 2 features within the same dimension that occur on different parts of an object. Using the change-detection paradigm, this experiment studied objects with 2 colors and objects with 2 orientations. Participants found it easier to monitor 1 rather than both features of such objects, even when decision noise was properly controlled for. However, no object-based benefit was observed for encoding the 2 features of each object that were of the same dimension. When similar stimuli were used but the 2 features of each object were from different dimensions (color and orientation), an object-based benefit was observed. These results thus impose a major constraint on object-based feature encoding theories by showing that only features from different dimensions can benefit from object-based encoding.