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Stimulus-specific variability in color working memory with delayed estimation

Bae, G.-Y.; Olkkonen, M.; Allred, S.R.; Wilson, C.; Flombaum, J.I.

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Authors

G.-Y. Bae

M. Olkkonen

S.R. Allred

C. Wilson

J.I. Flombaum



Abstract

Working memory for color has been the central focus in an ongoing debate concerning the structure and limits of visual working memory. Within this area, the delayed estimation task has played a key role. An implicit assumption in color working memory research generally, and delayed estimation in particular, is that the fidelity of memory does not depend on color value (and, relatedly, that experimental colors have been sampled homogeneously with respect to discriminability). This assumption is reflected in the common practice of collapsing across trials with different target colors when estimating memory precision and other model parameters. Here we investigated whether or not this assumption is secure. To do so, we conducted delayed estimation experiments following standard practice with a memory load of one. We discovered that different target colors evoked response distributions that differed widely in dispersion and that these stimulus-specific response properties were correlated across observers. Subsequent experiments demonstrated that stimulus-specific responses persist under higher memory loads and that at least part of the specificity arises in perception and is eventually propagated to working memory. Posthoc stimulus measurement revealed that rendered stimuli differed from nominal stimuli in both chromaticity and luminance. We discuss the implications of these deviations for both our results and those from other working memory studies.

Citation

Bae, G., Olkkonen, M., Allred, S., Wilson, C., & Flombaum, J. (2014). Stimulus-specific variability in color working memory with delayed estimation. Journal of Vision, 14(4), Article 7. https://doi.org/10.1167/14.4.7

Journal Article Type Article
Acceptance Date Sep 1, 2015
Online Publication Date Apr 8, 2014
Publication Date Apr 8, 2014
Deposit Date Nov 6, 2015
Publicly Available Date Mar 28, 2024
Journal Journal of Vision
Publisher Association for Research in Vision and Ophthalmology
Peer Reviewed Peer Reviewed
Volume 14
Issue 4
Article Number 7
DOI https://doi.org/10.1167/14.4.7

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