Selection and storage of perceptual groups is constrained by a discrete resource in working memory.
Selection and storage of perceptual groups is constrained by a discrete resource in working memory.
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DOI：
10.1037/a0030094
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发表时间：
2013-06
影响因子：
2.1
通讯作者：
Awh, Edward
中科院分区：
文献类型：
--
作者：
Anderson, David E.;Vogel, Edward K.;Awh, Edward
感知分组可以使观察者将多元素场景感知为较少数量的分层单元。过去的工作表明，分组使更多的元素被存储在视觉工作记忆（WM）。虽然这可能看起来与所谓的离散资源模型相矛盾，该模型主张WM存储中的固定项目限制，但分组也可能减少显示中的“项目”的有效数量。为了验证这一假设，我们研究了随着要存储的项目数量的增加，助记符分辨率如何下降。离散资源模型预测，精度将达到一个稳定的高原在相对较早的集大小，因为没有进一步的项目可以存储一旦假定的项目限制被超过。因此，我们研究了当通过感知分组增强存储时，集合大小函数的精度是否是双线性的。根据每个感知组都被算作一个“项目”的假设，在由存储组的数量决定的集合大小下，精确度仍然达到了一个明显的平台。此外，存储的元素的最大数量增加了一倍，和电生理措施表明，选择和存储相关的神经反应是相同的一个单一的元素和一个多元素感知组。因此，知觉分组允许更多的元素被保存在工作记忆中，而存储仍然受到离散项目限制的约束。
Perceptual grouping can lead observers to perceive a multielement scene as a smaller number of hierarchical units. Past work has shown that grouping enables more elements to be stored in visual working memory (WM). Although this may appear to contradict so-called discrete resource models that argue for fixed item limits in WM storage, it is also possible that grouping reduces the effective number of “items” in the display. To test this hypothesis, we examined how mnemonic resolution declined as the number of items to be stored increased. Discrete resource models predict that precision will reach a stable plateau at relatively early set sizes, because no further items can be stored once putative item limits are exceeded. Thus, we examined whether the precision by set size function was bilinear when storage was enhanced via perceptual grouping. In line with the hypothesis that each perceptual group counted as a single “item,” precision still reached a clear plateau at a set size determined by the number of stored groups. Moreover, the maximum number of elements stored was doubled, and electrophysiological measures showed that selection and storage-related neural responses were the same for a single element and a multielement perceptual group. Thus, perceptual grouping allows more elements to be held in working memory while storage is still constrained by a discrete item limit.
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DOI：
10.1523/jneurosci.1218-12.2012
发表时间：
2012-05-23
期刊：
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子：
--
作者：
Ester EF;Drew T;Klee D;Vogel EK;Awh E
通讯作者：
Awh E
影响因子：
1.8
作者：
Brady TF;Konkle T;Alvarez GA
通讯作者：
Alvarez GA
DOI：
10.1080/17470210802453977
发表时间：
2009-07
期刊：
Quarterly journal of experimental psychology (2006)
影响因子：
--
作者：
Chen Z;Cowan N
通讯作者：
Cowan N
DOI：
10.1073/pnas.0711295105
发表时间：
2008-04-22
影响因子：
11.1
作者：
Rouder, Jeffrey N.;Morey, Richard D.;Pratte, Michael S.
通讯作者：
Pratte, Michael S.
影响因子：
1.8
作者：
Bays PM;Catalao RF;Husain M
通讯作者：
Husain M