Working memory model

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  • Created on: 11-01-13 07:40
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Working memory model-
Developed by Baddeley and Hitch in 1974
Explains why we can do 2 different tasks at the same time but not
2 similar tasks
Suggests short term memory is not just one store but it made up
of 4 different stores within it
4 stores ­ central executive, phonological loop, visuo-spatial
sketchpad, and episodic buffer
each store deals with different types of information
Central executive-
monitors and
co-ordinates all other
mental functions in
working memory,
passes on information
to other stores and has
very limited capacity
Phonological loop- deals with any information that is auditory, has
a subdivided loop called the phonological store which acts as an
inner ear as it stores the information you hear. Also has another
subdivide being the articulatory process which acts as an inner
voice, used for words that are heard or seen, they are silently
repeated (form of maintenance rehearsal).
Visuo-spatial sketchpad- deals with any information that is visual
or spatial, temporarily stored here, visual information being what
things look like and spatial information the relationship between
things. Logie (1995) suggested this could be split into a visual cache
and inner scribe.
Episodic buffer- known as the general store, any information that
is not audio or visual is dealt with here, added later (2000) by
Baddeley. Has very small capacity but acts as an extra storage
system. Integrates information from other stores and LTM.
Doing 2 tasks using the same or different components-

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Hitch and Baddeley (1976)
Participants given 2 tasks to do simultaneously
Task 1 occupied the central executive, participants were given a
statement such as ` b is followed by a' then given two letters such
as `ab' then asked to say true or false.…read more

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Participants given a visual track task (following a moving light with
a pointer)
Given one of 2 tasks, task one to describe the angles on the letter
`F' and task two to perform a verbal task
Task 1 showed difficulty as the same component is being used
whereas task 2 showed little difficulty as two different
components were involved
Evidence for episodic buffer-
Baddeley et al 1987
When participants were shown words then asked to recall them
immediately, performance was much better for related words…read more


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