Visual working memory represents a fixed number of items regardless of complexity
Visual working memory represents a fixed number of items regardless of complexity
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DOI：
10.1111/j.1467-9280.2007.01949.x
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发表时间：
2007-07-01
影响因子：
8.2
通讯作者：
Vogel, Edward K.
中科院分区：
文献类型：
--
作者：
Awh, Edward;Barton, Brian;Vogel, Edward K.
视觉工作记忆是代表固定数量的对象，还是随着对象复杂性的增加而减少？我们测量了检测样本和测试显示器之间变化的准确性，发现容量估计值随着复杂性的增加而下降。然而，这些明显的容量减少与样本测试相似性的增加密切相关（r = 0.97），这增加了变化检测受到比较样本和测试中的错误限制的可能性，而不是受到保留在工作中的项目数量的限制。记忆。因此，当样本测试的相似性较低时，即使是最复杂的对象的容量估计值也相当于最简单的对象的估计值（r = 0.88），这表明视觉工作记忆代表了固定数量的项目，而不管复杂性如何。最后，相关分析提出了一个工作记忆能力的双因素模型，其中工作记忆中表征的数量和分辨率对应于记忆能力的不同维度。
Does visual working memory represent a fixed number of objects, or is capacity reduced as object complexity increases? We measured accuracy in detecting changes between sample and test displays and found that capacity estimates dropped as complexity increased. However, these apparent capacity reductions were strongly correlated with increases in sample-test similarity (r = .97), raising the possibility that change detection was limited by errors in comparing the sample and test, rather than by the number of items that were maintained in working memory. Accordingly, when sample-test similarity was low, capacity estimates for even the most complex objects were equivalent to the estimate for the simplest objects (r = .88), suggesting that visual working memory represents a fixed number of items regardless of complexity. Finally, a correlational analysis suggested a two-factor model of working memory ability, in which the number and resolution of representations in working memory correspond to distinct dimensions of memory ability.