February 2016
Volume 16, Issue 4
Open Access
OSA Fall Vision Meeting Abstract  |   February 2016
Probabilistic Reports of Working Memory for Color
Author Affiliations
  • Wei Ji Ma
    NYU
Journal of Vision February 2016, Vol.16, 27. doi:10.1167/16.4.22
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      Wei Ji Ma; Probabilistic Reports of Working Memory for Color. Journal of Vision 2016;16(4):27. doi: 10.1167/16.4.22.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Are working memory representations point estimates (e.g. a specific shade of red) or are they richer, consisting of a probability distribution over possible features? In a color memory task, subjects reported on each trial a segment of the color wheel that reflected both their estimate of the memorized color and their uncertainty. The reported uncertainty correlated with estimation error. In blocks in which a non-uniform prior over colors was used, estimates were biased towards the prior mean, and the bias was larger for larger reported uncertainty. Our findings are consistent with a Bayesian framework in which people reason with probabilistic color memories.

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