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ISSN : 1226-9654

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Vol.25 No.3
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The Fidelity of Representations in Visual Working Memory Assessed by a Consecutive-Change Detection Task

The Korean Journal of Cognitive and Biological Psychology / The Korean Journal of Cognitive and Biological Psychology, (P)1226-9654; (E)2733-466X
2013, v.25 no.3, pp.293-309
https://doi.org/10.22172/cogbio.2013.25.3.003


& (2013). The Fidelity of Representations in Visual Working Memory Assessed by a Consecutive-Change Detection Task. The Korean Journal of Cognitive and Biological Psychology, 25(3), 293-309, https://doi.org/10.22172/cogbio.2013.25.3.003
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Abstract

A salient change arising from a mismatch between information in visual working memory (VWM) and a visual stimulus has been known to trigger a shift of attention to the location of the change. However, little is known about what occurs to the memory representation in VWM once after the mismatch was successfully detected. In order to address this issue, we devised a consecutive-change detection task where two successive sets of test items were presented after a single set of memory items. In the task, the single memory array was followed by the first test array either with or without a changed item. After a brief interval, the second test array followed the first test array, again either with or without a changed item. When the first and second test arrays both had changes, the changes would have occurred at the same or different locations, and the test arrays were manipulated to have either partial or whole probes. Detection of the change in the second test array went inaccurate if the first array had a change, and this relative impairment was more evident when those two changes occurred across different locations on the tests arrays of whole probes. The results indicate that detection of a preceding visual change can disrupt detection of another subsequent change, and also suggests the impairment may owe to a response bottleneck rather than the lack of representational fidelity per se in VWM.

keywords
시각작업기억, 연속변화탐지, 반응 병목, 표상 공고성, visual working memory, consecutive-change detection, response bottleneck, representational fidelity

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