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The Effect of Articulatory Suppression Behaviors on the Performance of Working Memory System

The Korean Journal of Cognitive and Biological Psychology / The Korean Journal of Cognitive and Biological Psychology, (P)1226-9654; (E)2733-466X
2013, v.25 no.4, pp.483-516
https://doi.org/10.22172/cogbio.2013.25.4.006



Abstract

Baddeley(1986, 2000) proposed a working memory model which is composed of the executive control system, the visuospatial sketchpad, and the phonological loop. In studying the nature of the phonological loop, a variety of articulatory suppression behaviors have been applied in experiments, but their effects have not been intensively investigated. This study tried to probe effects of articulatory suppression behaviors, especially on working memory performances. Subvocal and overt speech forms, two speeds of rehearsal (articulation), presence or absence of suppression monitoring, and several kinds of suppression words were contrasted while participants tried to remember memory items auditorily presented. Working memory performances were measured by the memory span (Exp. 1) and the number of correctly recalled items (Exp. 2 & 3). Results are as follows: Overt articulatory suppression (Exp. 1), slow speeded rehearsal (Exp. 1) and non-condensation of suppression words (Exp. 2), and monitoring suppression words (Exp. 3) had more negative effects on working memory performances than its counterpart condition, respectively. In the subvocal articulatory suppression condition of Exp. 1, working memory performances varied with the rehearsal speed. And in the non-condensed condition of Exp. 2, the performances varied with kinds of suppression words. It was concluded that articulatory suppression behaviors have effects on the performances of working memory system, and these effects resulted from speech automatization of articulatory suppression behaviors. The results and conclusion of this study are not consistent with Baddeley's model which has not observed the effects of articulatory suppression behaviors. From this it follows that Baddeley's model should be reconfigured to include the effects of articulatory suppression behaviors.

keywords
작업기억, 조음억제행동, 중앙집행장치, 음운루프, 일화적 완충기, working memory, articulatory suppression behaviors, executive control system, phonological loop, episodic buffer

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