차폐 자극이 시각 작업 기억 비교 과정에 미치는 영향
Test of Comparison Process in Visual Working Memory by Consolidation Masking
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참고문헌
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초록
변화 탐지 과제(change-detection task)에서 시각 작업 기억에 저장된 정보는 감각 기관을 통해 유입되는 정보와 비교(comparison)되는 과정을 필요로 한다(Hyun 2006). 본 연구에서는 검사 항목이 제시된 직 후 차폐 자극을 제시하여 차폐에 의한 변화 탐지 정확도의 변화와 검사 항목에 의해 유발된 사건 관련 전위의 변화를 조사하였다. 피험자는 색상을 서로 달리하는 네 개의 정사각형과 뒤이어 제시된 또 다른 네 개의 정사각형간 색상 변화의 유무를 보고하는 변화 탐지 과제를 수행하였다. 검사 자극이 사라진 후 약 17ms 후 색상 차폐 자극이 각 사각형의 위치에 제시되었다. 변화 탐지 정확도는 차폐 자극이 제시된 조건에서 저하되었으며, 검사 자극에 의해 유발된 사건 관련 전위(N2pc) 또한 그 발현 정도가 현저히 저하되었다. 이는 검사 자극에 뒤이어 제시된 패턴 차폐 자극이 작업 기억에 저장된 정보를 감각 표상과 비교하는 과정을 방해함을 의미한다.
Abstract
Change-detection necessitates comparison of visual working memory (VWM) representations with perceptual inputs (Hyun, 2006). The current study tests masking interference with consolidation of test items being compared with sample items in memory. Subjects performed a change-detection task where they were asked for reporting a color change between two sets of colored boxes. In masking trials, complex pattern masks were presented at each item position 17ms after the test display disappeared. Change-detection performance was worse in masking trials than no-masking trials, and Event-related potentials (N2pc) was virtually absent when masks were present. The interference effect observed both behaviorally and electrophysiologically supports for the presence of a comparison process between memory and perceptual inputs.
참고문헌 (20)
- Baddeley,A.D., "Working Memory" (1986), Clarendon
- Cowan,N., "The magical number 4 in short-term memory: A reconsideration of mental storage capacity", Behavioral and Brain Sciences, 24, pp.87~185 (2001)
- Hyun,J.S., "How are visual working memory representations compared with perceptual inputs" (2006), University of Iowa
- "Journal of Vision", 2006, 985~
- Hyun, J.S., "The role of attention in the binding of surface features to locations", Visual Cognition
- "Journal of Vision", 2003, 322a~
- Jennings, J. R., "The e-adjustment procedure for repeated-measures analyses of variance", Psychophysiology, 13, pp.277~278 (1976)
- Luck, S. J., "Bridging the gap between monkey neurophysiology and human perception: An ambiguity resolution theory of visual selective attention", Cognitive Psychology, 33, pp.64~87 (1997)
- Luck, S. J., "Electrophysiological evidence for parallel and serial processing during visual search", Perception and Psychophysics, 48, pp.603~617 (1990)
- Luck, S. J., "Electrophysiological correlates of feature analysis during visual search", Psychophysiology, 31, pp.291~308 (1994)
- Luck, S. J., "Spatial filtering during visual search:?Evidence from human electrophysiology", Journal of Experimental Psychology: Human Perception and Performance, 20, pp.1000~1014 (1994)
- Luck, S. J., "The capacity of visual working memory for features and conjunctions", Nature, 390, pp.279~281 (1997)
- Mueller, H. J., "Reflexive and voluntary orienting of visual attention: Time course of activation and resistance to interruption", Journal of Experimental Psychology: Human Perception and Performance, 15, pp.315~330 (1989)
- Nakayama, K., "Sustained and transient components of focal visual attention", Vision Research, 29, pp.1631~1647 (1989)
- Vogel, E. K., "Neural activity predicts individual differences in visual working memory capacity", Nature, 428, pp.748~751 (2004)
- Vogel, E. K., "Neural measures reveal individual differences in controlling access to working memory", Nature, 438, pp.500~503 (2005)
- Vogel, E. K., "Storage of features, conjunctions, and objects in visual working memory", Journal of Experimental Psychology:Human Perception and Performance, 27, pp.92~114 (2001)
- Vogel, E. K., "The time course of consolidation in visual working memory", Journal of Experimental Psychology:Human Perception and Performance, 32(6), pp.1436~1451 (2006)
- Woodman, G. F., "Electrophysiological measurement of rapid shifts of attention during visual search", Nature, 400, pp.867~869 (1999)
- Woodman, G. F., "Serial deployment of attention during visual search", Journal of Experimental Psychology:Human Perception and Performance, 29, pp.121~138 (2003)