The role of representational volatility in recognizing pre- and postchange objects
The role of representational volatility in recognizing pre- and postchange objects
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DOI：
10.3758/bf03194575
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发表时间：
2003-04-01
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影响因子：
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通讯作者：
Levin, DT
中科院分区：
文献类型：
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作者：
Beck, MR;Levin, DT
注意与变化盲视（CB）的相关理论认为，注意焦点中的物体表征是稳定的、连贯的，然而，CB发生在注意焦点中的物体上。在这里，我们探讨这一明显的矛盾和可能性，即变化可以检测到没有一个完整的和稳定的表示的变化前的对象。第一个实验要求观察者在观察各种大小的阵列后识别变化前的对象和变化后的对象，在这些阵列中，变化前的对象在短暂的延迟后被变化后的对象取代。结果表明，改变前对象的表示足够强以提示改变，但不足够强以支持准确识别。剩下的实验证明了这一点。改变前对象的表示是不稳定的，因为显示中的移位或改变后对象的存在会破坏该表示。这些发现增加了目前的注意力和表征理论，表明注意力可能会导致不稳定的表征，可以支持变化检测，而不支持准确的识别。
Theories relating attention to Change blindness (CB) imply that representations of objects in the focus of attention are stable and coherent, However, CB occurs for objects in the focus of attention. Here, we explore this apparent contradiction and the possibility that changes can be detected without having a complete and stable representation of the prechange object. The first experiment required observers to recognize a prechange object and a postchange object after viewing arrays of various sizes in which the prechange object was replaced by the postchange object after a brief delay. Results indicated that. the representation of the prechange object was strong enough to cue a change but not strong enough to support accurate recognition. The remaining experiments demonstrated that. the representation of the prechange object is volatile in that a shift in the display or the presence of a postchange object can disrupt the representation. These findings add to current theories of attention and representations by showing that attention may result in volatile representations that can support change detection without supporting accurate recognition.