The capacity of visual short-term memory is not a fixed number of objects
The capacity of visual short-term memory is not a fixed number of objects
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DOI：
10.3758/bf03195307
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发表时间：
2005-03-01
影响因子：
2.4
通讯作者：
Holmes, A
中科院分区：
文献类型：
--
作者：
Davis, G;Holmes, A
Lucy和Vogel(1997)报告了几个惊人的结果，支持这样一种观点，即视觉短期记忆(VSTM)具有四个对象的固定容量，而不管这些对象包括多少相关特征。然而，最近的研究对这一说法提出了质疑，表明一旦其他因素在不同条件下更均匀地相等，对象数量的影响就会很弱。在这里，我们使用对称操作来验证显示中的对象分割，以证明当空间和掩蔽因子保持不变时，对象本身的数量对VSTM没有影响。取而代之的是，VSTM容量可以反映给定显示中的对象“部件”或特征连接的数量。
Luck and Vogel (1997) have reported several striking results in support of the view that visual short-term memory (VSTM) has a fixed capacity of four objects, irrespective of how many relevant features those objects comprise. However, more recent studies have challenged this account, indicating only a weak effect of the number of objects once other factors are more evenly equated across conditions. Here, we employed a symmetry manipulation to verify object segmentation in our displays, to demonstrate that when spatial and masking factors are held constant, the number of objects per se has no effect on VSTM. Instead, VSTM capacity may reflect the number of object "parts" or feature conjunctions in a given display.