What are the units of storage in visual working memory?
What are the units of storage in visual working memory?
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DOI：
10.1167/10.12.27
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发表时间：
2010-10-22
影响因子：
1.8
通讯作者：
Marois R
中科院分区：
文献类型：
--
作者：
Fougnie D;Asplund CL;Marois R
一个有影响力的理论认为，整合的对象，而不是单个的特征，是限制我们暂时存储视觉信息的能力的基本单位。使用一个范例，独立地估计存储在工作记忆中的项目的数量和精度，在这里，我们表明，存储的功能不是免费的。当观察者必须记住简单物体的颜色、方向或同时记住颜色和方向时，工作记忆中物体的精度和数量被估计。我们发现，虽然存储对象的数量在很大程度上不受增加特征数量的影响，但这些表示的精度却大大降低了。此外，对象精度的这种选择性恶化取决于同一对象中包含的多个特征。这种保真度的成本，甚至观察到变化检测范式时，这些范式的要求，对存储的视觉表示的精度。总之，这些研究结果不仅表明，维护的综合功能是昂贵的，他们还表明，对象和功能影响视觉工作记忆容量不同。
An influential theory suggests that integrated objects, rather than individual features, are the fundamental units that limit our capacity to temporarily store visual information. Using a paradigm that independently estimates the number and precision of items stored in working memory, here we show that the storage of features is not cost-free. The precision and number of objects held in working memory was estimated when observers had to remember either the color, the orientation, or both the color and orientation of simple objects. We found that while the quantity of stored objects was largely unaffected by increasing the number of features, the precision of these representations dramatically decreased. Moreover, this selective deterioration in object precision depended on the multiple features being contained within the same objects. Such fidelity costs were even observed with change detection paradigms when those paradigms placed demands on the precision of the stored visual representations. Taken together, these findings not only demonstrate that the maintenance of integrated features is costly; they also suggest that objects and features affect visual working memory capacity differently.
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影响因子：
3.5
作者：
Eng, HY;Chen, DY;Jiang, YH
通讯作者：
Jiang, YH
影响因子：
1.7
作者：
Delvenne, Jean-Francois;Bruyer, Raymond
通讯作者：
Bruyer, Raymond
影响因子：
1.8
作者：
Bays PM;Catalao RF;Husain M
通讯作者：
Husain M
影响因子：
2.4
作者：
Davis, G;Holmes, A
通讯作者：
Holmes, A
DOI：
10.1037/a0015792
发表时间：
2009-10
影响因子：
2.1
作者：
Barton, Brian;Ester, Edward F.;Awh, Edward
通讯作者：
Awh, Edward