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ISSN : 1226-9654

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Vol.25 No.3

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자극의 신호강도가 주의 깜박임 현상에 미치는 영향

The effect of signal strength on the attentional blink

한국심리학회지: 인지 및 생물 / The Korean Journal of Cognitive and Biological Psychology, (P)1226-9654; (E)2733-466X
2013, v.25 no.3, pp.273-291
https://doi.org/10.22172/cogbio.2013.25.3.002
어강용 (연세대학교 인지과학협동과정)
주성준 (Department of Psychology, University of Texas, Austin)
정상철 (연세대학교)
어강용, 주성준, & 정상철. (2013). 자극의 신호강도가 주의 깜박임 현상에 미치는 영향. 한국심리학회지: 인지 및 생물, 25(3), 273-291, https://doi.org/10.22172/cogbio.2013.25.3.002

초록

주의 깜박임 현상은 기억 혹은 주의의 용량 제한 때문에 발생하는 상위 영역 현상으로 알려져 있다. 그러나 최근의 주의 깜박임 연구들은 자극의 현저성과 같은 하위 영역 특징 또한 주의 깜박임 현상에 영향을 미친다는 것을 관찰하였다. 본 연구는 작업기억 용량 제한뿐만 아니라 자극의 하위 영역 특징도 주의 깜박임 현상에 영향을 미친다는 주의 단계 모델을 검증하고자 하였다. 구체적으로, 하위 영역의 특징들 중 T2의 신호 강도를 조절하여 주의 깜박임 현상에 영향을 미치는지 여부를 조사하였다. 실험 1에서는 단순한 방위 탐지 과제도 주의 깜박임 현상을 발생시킬 수 있다는 것을 관찰하였다. 실험 2에서는 방위 탐지 과제(실험 2-1)와 숫자 탐지 과제(실험 2-2)를 사용하여 T2의 신호 강도가 주의 깜박임 정도를 변화시킴을 관찰하였다. T2의 신호 강도에 따라 주의 깜박임 정도가 달라질 수 있다는 본 연구의 결과는 하위 영역 특징도 주의 깜박임 현상에 영향을 미친다는 주의 단계 모델을 지지한다.

keywords
주의 깜박임, 주의 단계 모델, 신호 강도, the attentional blink, an attentional cascade model, signal strength

Abstract

The attentional blink (AB) is a high-level phenomenon that is known to occur due to capacity limitations in memory or limited resources in attention. Recent studies, however, have shown that low-level visual features such as the bottom-up saliency of a stimulus can also influence the AB. In this study, we investigated the validity of an attentional cascade model which is based on the assumption that both working memory and bottom-up saliency will influence the AB. More specifically, we manipulated the signal strength, one of low-level features, of the second target (T2) and investigated its effect on the AB. In Experiment 1, we were able to observe that a simple orientation detection task produced the AB, suggesting that the AB can occur even for simple orientation stimuli. In Experiment 2, it was observed that the amount of the AB was modulated by the signal strength of T2 both in the orientation detection task (Experiment 2-1) and in the digit detection task (Experiment 2-2). Through these results, it was shown that the AB can be regulated by the signal strength of T2. Furthermore, the result for which the effect of the AB varies depending on the signal strength of T2 supports the validity of the attentional cascade model.

keywords
주의 깜박임, 주의 단계 모델, 신호 강도, the attentional blink, an attentional cascade model, signal strength

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