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Feature-Specific Encoding Flexibility in Visual Working Memory

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  • Aki Kondo
  • Jun Saiki

Abstract

The current study examined selective encoding in visual working memory by systematically investigating interference from task-irrelevant features. The stimuli were objects defined by three features (color, shape, and location), and during a delay period, any of the features could switch between two objects. Additionally, single- and whole-probe trials were randomized within experimental blocks to investigate effects of memory retrieval. A series of relevant-feature switch detection tasks, where one feature was task-irrelevant, showed that interference from the task-irrelevant feature was only observed in the color-shape task, suggesting that color and shape information could be successfully filtered out, but location information could not, even when location was a task-irrelevant feature. Therefore, although location information is added to object representations independent of task demands in a relatively automatic manner, other features (e.g., color, shape) can be flexibly added to object representations.

Suggested Citation

  • Aki Kondo & Jun Saiki, 2012. "Feature-Specific Encoding Flexibility in Visual Working Memory," PLOS ONE, Public Library of Science, vol. 7(12), pages 1-8, December.
    • Handle: RePEc:plo:pone00:0050962
    DOI: 10.1371/journal.pone.0050962
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    References listed on IDEAS

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    2. Edward K. Vogel & Andrew W. McCollough & Maro G. Machizawa, 2005. "Neural measures reveal individual differences in controlling access to working memory," Nature, Nature, vol. 438(7067), pages 500-503, November.
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