Verbal information seems to be automatically processed by phonological loop and it also plays an important, maybe even key role in language learning and speech production. Processor which maintains sound information in the storage by vocal or sub vocal repetition. It serves as the storage component of central executive, or otherwise information integration wouldn't be possible.Īccording to Baddeley, phonological loop consists of two components : a sound storage which lasts just a few seconds and an articulatory These functions also include communication with long-term memory and connections to language understanding and production centers.Įpisodic buffer has the role of integrating the information from phonological loop and visuospatial sketchpad, but also from long-term memory. Sequencing, updating, maintenance and integration of information from phonological loop and visuospatial sketchpad. Central executive's functions include attention and focusing, active inhibition of stimuli, planning and decision-making, It is still unclear whether it is a single system or more systems working together. This model was later revised and improved by Baddeley but also contributed by other authors, which resulted in additional component of episodic buffer in year 2000 and more detailed functions and analysis of other components, as described in table below. Baddeley and Hitch suggested working memory is composed of three parts: the central executive, a system that controls the phonological loop (a subsystem for remembering phonological information such as language by constant refreshing through repetition in the loop), and the visuospatial sketch pad (a subsystem for storing visual information). The new term working memory was supposed to emphasize the importance of this system in cognitive processing. \)īased on experiments demonstrating connections between LTM and STM, as well as experiments indicating that STM consists of more components, Alan Baddeley and Graham Hitch proposed a multi-component working memory model in 1974.
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