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Working Memory Model - Coggle Diagram
Working Memory Model
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:red_cross: Other Explanations - The original model was that it didn't explain evidence from verbal span experiments that verbal and visual encoding could be combined. The model could not explain how the subcomponents could interfere with each other or with LTM. Baddeley addressed this in 2000 with the addition of a fourth component called the episodic buffer. The episodic buffer was proposed as a limited capacity storage system the could intergrate infomation between the subcomponents and feed into and retrieve infomation from LTM.
:red_cross: Challenging Evidence - The exact location of the central executive in the brain has been difficult to find and it is thought to be largely diffuse across the cortex.
:check: Supporting Evidence - Neuroimaging: research has been carried out in different regions of the brain and have looked to the phonological store and articulatory loop. PET scans fund that Broca's area activated when the phonological store was being used.
This provides evidence for the phonological loop and it's separate subcomponents.
:check: Testable - Their is a lot of research to support WMM, e.g. lab studies, case studies and brain scans.
Helps us to understand real life examples such as Alzheimer's.
:check: Usefulness - Patients suffering from Alzheimer's disease has shown decreased central executive function as the disease has progressed. performing a visual or verbal task but showed significant impairment when trying to do them together, this impairment in performance demonstrates significant problems with executive functioning.
Central Executive - drives the whole system, very limited capacity. Functions to direct attention and resources. It has a supervisory role as when data arrives it allocates into two the two slave systems.
Phonological Loop - Limited capacity, deals with auditory information and preserves word order.
- Brady further divided it;
. Phonological store - hold words heard for 1-2 seconds
. Articulartory process - holds words seen/ heard and silenlty repeated like an inner voice, as a kind of maintinance rehersal.
Episodic Buffer - Baddely added it in 2000 as he realised it needed to be a more general store. central executive has no storage capacity, PL and VSSP deals with specific types of information.
Visuo-Spatial Sketchpad - Limited capacity, visual and/ or spatial information processed and stored in the inner eye.
. Visual - appearance
. Spatial - position/ location - relationships between things
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