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The WMM - Baddeley and Hitch (Central executive (Allocates slave systems…
The WMM - Baddeley and Hitch
Model of STM
Central executive
Allocates slave systems and monitors incoming data
limited capacity store
Lack of clarity (-)
cog psychologists say that its unsatisfactory and should be more clearly defined than simply 'pay attention' showing that the WMM isn't fully explained
Important as this is the main element of the model
Phonological loop
This deals with auditory information
Articulatory process- allows maintenance rehearsal
Phonological store - stores the words you hear
Visual-spatial sketchpad
this stores visual/spatial info
inner scribe - records arrangements of objects in visual field
visual cache - stores visual data
Episodic buffer
Temporary store for information and integrated all other stores recording events (episodic) linking to LTM
Added in 2000
Case of KF supports STM stores
brain damaged patient could recall words when he read them himself, however could not recall words read allowed to him
so his Phonological loop had been damaged but left his articulatory store relatively unaffected
this suggests there are separate visual and acoustic stores
However, evidence from brain damaged pp's may be unreliable as it concerns unique pp's who've had traumatic experiences
lack of control over variables e.g. precise location of brain damage and pp variables
Dual-task studies supports VSS
Baddeley found pp's had more difficulty doing 2 visual tasks than a visual and auditory task at the same time
This is because both visual tasks compete for the same limited resources where as if autitory also then there is no competition
evidence for VSS which the MSM can't explain
Supported by brain scan studies
PP's carried out tasks involving the CE while their brans were scanned. Activity found int he prefrontal cortex
activity in this area increased as the tasks became harder - this makes sense in terms of the WMM as demands on the CE increased, it has to work harder to fulfil its functions
provides evidence that the CE may have a physical reality in the brain
Reductionist
WMM breaks memory down into individual components opposed to holistic approach by looking at memory as a whole in individuals