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ISSN : 1226-9654

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Vol.21 No.3
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시각작업기억과 지각입력 간 비교 처리 과정에서의 선별적 변화 탐지의 특성

The Nature of Selective Process during The Comparison between Visual Working Memory and Perceptual Inputs

한국심리학회지: 인지 및 생물 / The Korean Journal of Cognitive and Biological Psychology, (P)1226-9654; (E)2733-466X
2009, v.21 no.3, pp.147-166
https://doi.org/10.22172/cogbio.2009.21.3.001
현주석 (중앙대학교)
현주석. (2009). 시각작업기억과 지각입력 간 비교 처리 과정에서의 선별적 변화 탐지의 특성. 한국심리학회지: 인지 및 생물, 21(3), 147-166, https://doi.org/10.22172/cogbio.2009.21.3.001
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초록

시각작업기억과 유입되는 지각정보와의 비교 처리는 매우 신속하고 즉각적임이 알려져 있다(Hyun, Woodman, Vogel, Niese, & Luck, 2003). 본 연구는 피험자에게 개체들의 특정 세부특징 차원에서 발생하는 변화를 탐지하도록 하고, 다른 무시된(ignored) 즉, 과제 무관련 세부특징 차원에서 변화를 유발시켜 무관련 변화가 탐지될 수 있는가를 검사하였다. 무관련 세부특징 탐지 여부를 알아보기 위해 표적 탐지에 따른 주의 전환과 동시에 나타나는 사건관련전위인 N2pc(N2 post contralateral component)를 측정하였다. 그 결과 무관련 차원에서의 변화는 변화가 탐지된 위치로 주의 전환을 유발시키지 않는 것으로 나타났다. 그러나 무관련 차원에서 발생하는 변화의 개수를 한 개에서 네 개로 증가시켰을 경우 피험자는 변화가 한 개였던 경우에 비해 무관련 차원의 변화들에 의해 과제수행에 좀 더 방해를 받은 것으로 나타났다. 이 결과는 시각작업기억 표상과 유입되는 지각적 표상간의 비교는 매우 신속하고 무한용량 처리 과정인 동시에 필요한 경우, 통제적 처리 기제에 의해 선별적으로 수행될 수 있음을 의미한다.

keywords
시각작업기억, 비교, 변화탐지, N2pc, 통제적 처리, visual working memory, comparison, change detection, N2pc, controlled process, visual working memory, comparison, change detection, N2pc, controlled process

Abstract

Comparison between visual working memory (VWM) representation and incoming perception has been reported to be rapid and immediate (Hyun, Woodman, Vogel, Niese, & Luck, 2003). The present study further tested if a visual change in an ignored or in other words, a task‐irrelevant feature dimension would be detected while a relevant feature dimension is paid attention for change‐detection. Electrophysiological index of change‐induced shift of attention (e.g., N2pc) indicated that the irrelevant change does not appear triggering the shift of attention to a location of the change. When increased the number of changes however, subjects were more distracted than when there was only a single change. The results indicate that comparison between solid VWM representation and incoming perception occurs in an automatic fashion but can operate selectively in a controlled manner if necessary.

keywords
시각작업기억, 비교, 변화탐지, N2pc, 통제적 처리, visual working memory, comparison, change detection, N2pc, controlled process, visual working memory, comparison, change detection, N2pc, controlled process

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