Variability in the quality of visual working memory.

Variability in the quality of visual working memory.
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DOI:
10.1038/ncomms2237
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发表时间:
2012
影响因子:
16.6
通讯作者:
Alvarez, George A.
Alvarez, George A.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Fougnie, Daryl;Suchow, Jordan W.;Alvarez, George A.

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工作记忆是一种心理存储系统,可以在很短的时间内保持任务相关信息的可访问性,但它的局限性令人惊讶。它的限度因人而异,但被认为是为特定的人固定的。在这里,我们表明,在个人内部的工作记忆表征质量上有很大的变异性。这种变化既不能用注意力或觉醒随时间的波动来解释,也不能用有限的精神商品的不均匀分布来解释。这种变异性与工作记忆容量的标准认知模型的假设不一致,包括时隙模型和基于资源的模型,因此我们提出了一个新的框架来理解工作记忆的局限性:一个在记忆中独立发挥的随机退化过程。
Working memory is a mental storage system that keeps task-relevant information accessible for a brief span of time, and it is strikingly limited. Its limits differ substantially across people but are assumed to be fixed for a given person. Here we show that there is substantial variability in the quality of working memory representations within an individual. This variability can be explained neither by fluctuations in attention or arousal over time, nor by uneven distribution of a limited mental commodity. Variability of this sort is inconsistent with the assumptions of the standard cognitive models of working memory capacity, including both slot- and resource-based models, and so we propose a new framework for understanding the limitations of working memory: a stochastic process of degradation that plays out independently across memories.
DOI: 10.1167/11.12.3
发表时间: 2011-10-06
期刊: Journal of vision
影响因子: 1.8
作者:
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通讯作者: Alvarez GA
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期刊: The Journal of neuroscience : the official journal of the Society for Neuroscience
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