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EVALUATION. - Coggle Diagram
EVALUATION.
Clinical evidence.
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However...
- It was clear whether the patient had other cognitive impairments.
- This may have effected their performance on memory tasks
This challenges evidence that comes from clinical studies and may have affected other systems that we were unaware of.
Trojano and Grossi 1995.
Found that one of their brain injury patients had generally good learning abilities with the exception of being unable to learn word pairs that were presented out loud.
Suggests that there was damage to the phonological loop.
Validity of the Model.
- Dual-task studies support the WMM because two tasks that share a subsystem are much harder to perform together than tasks that involve separate subsysterm.
Therefore, there must be separate components in WM.
However...
- These studies use tasks that are very unlike the tasks we perform in real life.
- They are carried out in highly controlled lab conditions.
Strengths…
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SHallice and Warrington carried out a case studt reptoed that brain damaged patient KF could recall verbal but not visual information immeditiatly. Supports the model.
The model was developed based on evidence from lab experiments, so confounding variables could be carefully controlled to produce reliable results.
Dual Task performance.
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Hitch and Baddeley 1976.
supported CE existence.
- Task one occupied the CE.
- Task two occupied the articulatory loop and CE
- Results showed that task one was slower than task 2.
- This supports the dual task performance effect and shows that the central executive is one of the components of the WMM.
Nature of the CE.
- There is a lack of clarity over the nature of the CE.
- Baddeley 2003 said:
' It is the most important but the least understood component of the working memory'
- The CE needs to be more clearly specified than just simply 'attention'.
- Some psychologists believe it consists of separate subcomponents.
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Limitations
Desire providing more detail of STM than the MSM, WMM has been criticised for being too simplic and vague. For example, the role of CE is unclear and in depth.
Results from lab experiments researching the WMM will often have low ecological validity, as tasks such a repeating ‘the the the’ are not representative of our everyday life.