The Focus of Attention in Visual Working Memory: Protection of Focused Representations and Its Individual Variation.
The Focus of Attention in Visual Working Memory: Protection of Focused Representations and Its Individual Variation.
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视觉工作记忆中注意力的重点：保护集中表示及其个体变化。
DOI：
10.1371/journal.pone.0154228
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Schubö A
中科院分区：
文献类型：
--
作者：
Heuer A;Schubö A
视觉工作记忆可以根据保持项目的线索任务相关性的变化进行调节。在这里，我们研究了这种调制的机制。特别是，我们研究的后果，注意力选择选定的项目，和注意力的部署效率的个体差异的作用。为此，分析了视觉工作记忆任务以及与视觉工作记忆和注意力过程相关的CDA/SPCN和N2 pc（ERP组件）的表现。在维护阶段的选择是操纵通过两个连续呈现的retrocues提供的空间信息，哪些项目是最有可能被测试。结果表明，注意选择服务于鲁棒地保护相关的代表在关注的焦点，而可能再次成为相关的不确定的代表仍然可用。具有较大回溯益处的个体表现出更高的注意力选择效率，如N2 pc所示，并表现出更强的维持相关活动（CDA/SPCN）。这些发现增加了集中表征受到保护的证据，并强调了视觉工作记忆的灵活性，其中信息可以根据其相关性进行加权。
Visual working memory can be modulated according to changes in the cued task relevance of maintained items. Here, we investigated the mechanisms underlying this modulation. In particular, we studied the consequences of attentional selection for selected and unselected items, and the role of individual differences in the efficiency with which attention is deployed. To this end, performance in a visual working memory task as well as the CDA/SPCN and the N2pc, ERP components associated with visual working memory and attentional processes, were analysed. Selection during the maintenance stage was manipulated by means of two successively presented retrocues providing spatial information as to which items were most likely to be tested. Results show that attentional selection serves to robustly protect relevant representations in the focus of attention while unselected representations which may become relevant again still remain available. Individuals with larger retrocueing benefits showed higher efficiency of attentional selection, as indicated by the N2pc, and showed stronger maintenance-associated activity (CDA/SPCN). The findings add to converging evidence that focused representations are protected, and highlight the flexibility of visual working memory, in which information can be weighted according its relevance.