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Hierarchical Encoding in Visual Working Memory: Ensemble Statistics Bias Memory for Individual Items

Open access
Brady, Timothy F., Alvarez, George A.·2011·Psychological Science

Abstract

Influential models of visual working memory treat each item to be stored as an independent unit and assume that there are no interactions between items. However, real-world displays have structure that provides higher-order constraints on the items to be remembered. Even in the case of a display of simple colored circles, observers can compute statistics, such as mean circle size, to obtain an overall summary of the display. We examined the influence of such an ensemble statistic on visual working memory. We report evidence that the remembered size of each individual item in a display is biased toward the mean size of the set of items in the same color and the mean size of all items in the display. This suggests that visual working memory is constructive, encoding displays at multiple levels of abstraction and integrating across these levels, rather than maintaining a veridical representation of each item independently.

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Metadata

Authors
Brady, T. F., & Alvarez, G. A.
Venue
Psychological Science
Published
2011-02-04
Volume
22
Issue
3
Pages
384-392
ISSN
  • 0956-7976 (ISSN-L)
  • 1467-9280
OpenAlex
W2108936682
Cited by
416
References
2
FWCI
8.29
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Hierarchical Encoding in Visual Working Memory: Ensemble Statistics Bias Memory for Individual Items. https://app.cochat.ai/papers/10.1177/0956797610397956
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Brady, T. F., & Alvarez, G. A. (2011). Hierarchical Encoding in Visual Working Memory: Ensemble Statistics Bias Memory for Individual Items. Psychological Science. https://doi.org/10.1177/0956797610397956

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Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.