Divided attention limits perception of 3-D object shapes.
Divided attention limits perception of 3-D object shapes.
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注意力分散限制了对 3D 物体形状的感知。
DOI：
10.1167/13.2.18
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发表时间：
2013
影响因子：
1.8
通讯作者：
Moore,CathleenM
中科院分区：
文献类型：
--
作者：
Scharff,Alec;Palmer,John;Moore,CathleenM
翻译后摘要：摘要可以一次感知多个对象的形状？我们测试了两个基准模型的对象形状感知下的注意力分散：无限容量和固定容量模型。在无限容量模型下，形状是独立和并行分析的。在固定容量模型下，形状以固定速率处理（如在串行模型中）。为了区分这些模型，我们比较了观察者同时或顺序呈现固定数量物体的条件（扩展的顺序方法：Scharff，Palmer，&摩尔，2011 a，2011 b）。我们使用新的物理对象作为刺激，尽量减少语义分类在任务中的作用。观察者在相似的物体中寻找特定的物体。我们确保了非形状刺激属性，如颜色和纹理，不能用来完成任务。不可预测的视角被用来排除图像匹配策略。结果拒绝了物体形状感知的无限容量模型，并与固定容量模型的预测一致。相比之下，要求观察者以可预测的视角识别二维形状的任务产生了无限的容量结果。进一步的实验排除了容量限制的其他解释，使我们得出结论，感知3D物体形状的能力存在固定的容量限制。
Abstract:Abstract Can one perceive multiple object shapes at once? We tested two benchmark models of object shape perception under divided attention: an unlimited-capacity and a fixed-capacity model. Under unlimited-capacity models, shapes are analyzed independently and in parallel. Under fixed-capacity models, shapes are processed at a fixed rate (as in a serial model). To distinguish these models, we compared conditions in which observers were presented with simultaneous or sequential presentations of a fixed number of objects (The extended simultaneous-sequential method: Scharff, Palmer, & Moore, 2011a, 2011b). We used novel physical objects as stimuli, minimizing the role of semantic categorization in the task. Observers searched for a specific object among similar objects. We ensured that non-shape stimulus properties such as color and texture could not be used to complete the task. Unpredictable viewing angles were used to preclude image-matching strategies. The results rejected unlimited-capacity models for object shape perception and were consistent with the predictions of a fixed-capacity model. In contrast, a task that required observers to recognize 2-D shapes with predictable viewing angles yielded an unlimited capacity result. Further experiments ruled out alternative explanations for the capacity limit, leading us to conclude that there is a fixed-capacity limit on the ability to perceive 3-D object shapes.