Active suppression of distractors that match the contents of visual working memory.

Active suppression of distractors that match the contents of visual working memory.
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DOI:
10.1080/13506285.2011.603709
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发表时间:
2011-08
期刊:
影响因子:
2
通讯作者:
Luck SJ
Luck SJ
中科院分区:
心理学4区
文献类型:
--
作者:
Sawaki R;Luck SJ

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有偏竞争理论认为,与视觉工作记忆内容相匹配的项目会自动在争夺注意力的竞争中占据优势。然而,自动效应的证据是混合的,也许是因为记忆驱动的注意力偏向可以通过自上而下的抑制来克服。为了验证这一假设,事件相关电位波形的PD分量被用作注意抑制的标志。虽然观察者在工作记忆中保持了一种颜色,但呈现的与任务无关的探针阵列包含了与记忆中保持的颜色相匹配的物品。我们发现,记忆匹配探测引发了一个PD成分,表明它被积极抑制。这一结果表明,与视觉工作记忆中保存的信息相匹配的感觉输入会自动被检测到,并产生一个“注意到我”的信号,但这个信号可以被一个主动的抑制机制所覆盖,以阻止实际的注意力捕获。
The biased competition theory proposes that items matching the contents of visual working memory will automatically have an advantage in the competition for attention. However, evidence for an automatic effect has been mixed, perhaps because the memory-driven attentional bias can be overcome by top-down suppression. To test this hypothesis, the Pd component of the event-related potential waveform was used as a marker of attentional suppression. While observers maintained a color in working memory, task-irrelevant probe arrays were presented that contained an item matching the color being held in memory. We found that the memory-matching probe elicited a Pd component, indicating that it was being actively suppressed. This result suggests that sensory inputs matching the information being held in visual working memory are automatically detected and generate an “attend-to-me” signal, but this signal can be overridden by an active suppression mechanism to prevent the actual capture of attention.
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