ISSN : 1226-9654
관찰자는 하나의 자극이 제시되었을 때보다 두 개의 똑같은 자극이 제시되었을 때 자극을 더 빨리 탐지하고 더 정확히 기억할 수 있는데, 이러한 현상을 중복 효과(redundancy effect)라고 한다. 본 실험은 방해자극의 중복 효과가 표적 반응에 미치는 영향을 관찰함으로써 시각 체계가 중복된 자극을 처리하는 방식을 이해하고자 하였다. 단어-사진 스트룹 과제에서 자극 간 출현 시간 간격이 변화할 때 단일 방해자극과 중복된 방해자극에 의한 반응 간섭량을 측정하였다. 그 결과, 중복된 두 개의 방해자극은 단일 방해자극에 비해 전반적인 표적 반응 시간에는 영향을 끼치지 않았음에도 불구하고 유의미하게 큰 스트룹 간섭을 유발하였다. 본 실험의 결과는 중복된 자극이 개별적으로 처리된다고 보는 경주 모형보다, 중복된 자극이 단일한 지각 표상을 구성한다고 가정하는 공동 활성화 모형을 지지한다.
Observers more rapidly detect and more accurately remember two identical targets than a single target, a phenomenon called the redundancy effect. To understand how the visual system deals with redundant information, the current experiment investigated the effect of redundant distractors on target responses. In a word-picture Stroop task, we measured response interference by a single or redundant distractors when the stimulus onset asynchrony varies between a target and the distrator(s). As results, two redundant distractors produced greater Stroop interference than a single distractor although overall response times remained constant. These findings are not compatible with a race model, which assumes separate processing of redundant stimuli, but support a coactivation model, which assumes that redundant stimuli form a single perceptual representation.
이지영, 민수정, 이도준 (2011). 스트룹 간섭의 희석 및 중복 효과. 인지과학, 22(4), 469-494.
Barlow, H. B. (1959). Sensory mechanisms, the reduction of redundancy, and intelligence. The mechanisation of thought processes, 10, 535-539.
Brainard, D. H. (1997). The Psychophysics Toolbox. Spatial Vision, 10(4), 433-436.
Eriksen, C. W., Goettl, B., James, J. D. S., & Fournier, L. R. (1989). Processing redundant signals: Coactivation, divided attention, or what? Perception & Psychophysics, 45(4), 356- 370.
Fiedler, A., Schroter, H., & Ulrich, R. (2013). Redundancy gain for semantic features. Psychonomic Bulletin & Review, 20(3), 474-480.
Giray, M., & Ulrich, R. (1993). Motor coactivation revealed by response force in divided and focused attention. Journal of Experimental Psychology: Human Perception and Performance, 19(6), 1278-1291.
Glaser, W. R., & Dungelhoff, F. J. (1984). The time course of picture-word interference. Journal of Experimental Psychology: Human Perception and Performance, 10, 640-654.
Jiang, Y. V., Kwon, M., Shim, W. M., & Won, B.-Y. (2010). Redundancy effects in the perception and memory of visual objects. Visual Cognition, 18(9), 1233-1252.
Kahneman, D., Treisman, A., & Gibbs, B. J. (1992). The reviewing of object files: object-specific integration of information. Cognitive Psychology, 24(2), 175-219.
Miller, J. (1982). Divided attention: Evidence for coactivation with redundant signals. Cognitive Psychology, 14(2), 247-279.
Mordkoff, J. T., & Yantis, S. (1991). An interactive race model of divided attention. Journal of Experimental Psychology: Human Perception and Performance, 17(2), 520-538.
Raab, D. H. (1962). Statistical facilitation of simple reaction times. Transactions of the New York Academy of Sciences, 24, 574-590.
Ulrich, R., Miller, J., & Schroter, H. (2007). Testing the race model inequality: an algorithm and computer programs. Behavior Research Methods, 39(2), 291-302.
Won, B. Y., & Jiang, Y. V. (2013). Redundancy effects in the processing of emotional faces. Vision Research, 78, 6-13.