Outline and Evaluate the Working Memory Model

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Outline and evaluate the working memory model (12) Baddely and Hitch considered that the STM store in the Multi-store Model was too bland and simplified; they believed that STM was not a passive store, but several active processes that manipulate information. Baddely and Hitch also suggested that if a task involved different parts of the wrking memory system then 2 tasks could be undertaken simultaneously; eg, processing vision and sound. There is evidence to show that there is more than one component in STM and this has been provided by Baddeley and Hitch. They divised the dual task technique. They asked participants to perform a reasoning task while simultaneously reciting outloud a list of six digits. If didgit span really is a measure of maximum STM capacity, participants would be expected to show in paired performance on the reasoning task because their STM would be ocupied retaining the 6 digits. However, they found that participants made very few errors on either the reasoning or digit span task, although the speed of veryfying the sentences was slightly slower than when the task was done alone. Baddeley and Hitch concluded that the STM must have more than 1 component and must be involved in processes other than simple storage; eg, reasoning, undestanding and learning. The working memory model consists of four parts: episodic buffer, phonological loop, central executive and visio spatial sketchpad; The episodic buffer is a fairly recent addition to the working memory model. Its purpose is to bind together all of the information from the other components of working memory with information about time and order. This prepares memories for storage in the episodic LTM. The phonological loop consists of two parts, Articulatory Control System and the Phonological Store. The Articulatory Control System rehearses information verbally and has a tiny capacity

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