The central executive has limited capacity but can process information from any sense.
It carries out a wide range of control processes including switching attention between two tasks and retrieving information from LTM.
It is supported by two slave systems which it allocates tasks to.
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Phonological loop
The phonological loop deals with auditory and verbal information and preserves the order of information.
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Visuo-spatial sketchpad
The visuo-spatial sketchpad deals with visual and spatial tasks e.g. planning a journey, remembering a face or recalling the order of shops on your local highstreet.
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Episodic buffer
Baddeley added the episodic buffer to the model because it lacked a general store.
The funtion of the episodic buffer is to integrate information from the central executive, the phonological loop and the visuo-spatial sketch pad to form LTM.
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