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Effects of loads on Visual Working Memory and Central Executive on Efficiency and Reaction Time of Visual Search: the Possibility of Existance of Episodic Buffer

The Korean Journal of Cognitive and Biological Psychology / The Korean Journal of Cognitive and Biological Psychology, (P)1226-9654; (E)2733-466X
2004, v.16 no.1, pp.93-109



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Abstract

The purpose of this study was to investigate the possibility of existence of episodic buffer proposed as a new component of working memory. To do so, we examined the effects of loads on visual working memory and central executive on search efficiency and reaction times in visual search tasks. Experiment 1 investigated the role of visual working memory and central executive on visual search. The results showed that separate loads on visual working memory and central executive did not impair search. The simultaneous loads on visual working memory and central executive increased reaction times, but it did not impair search efficiency. Experiment 2 and 3 examined whether the comparison between the searched objects and target representation was involved in visual working memory. In result, it was not found that searched-visual information interfered with stored-visual information. These results suggest that another component of working memory should be assumed to be able to store visual information. Therefore, the findings support the possibility of existence of episodic buffer.

keywords
visual working memory, central executive, episodic buffer, visual search, visual working memory, central executive, episodic buffer, visual search, 시각작업기억, 중앙집행부, 임시완충기, 시각탐색

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The Korean Journal of Cognitive and Biological Psychology