Evaluation of the Working Memory Model
Strengths of the Working Memory Model
The Working Memory Model has several strengths that contribute to its validity and usefulness in understanding memory processes:
- Research support from dual-task studies: Experiments have shown that participants perform better when using different components of the WMM simultaneously.
Example: The Baddeley and Hitch dual task experiment (1976) demonstrated that performance was impaired when both tasks used the phonological loop, but improved when one task used the phonological loop and the other the visuospatial sketchpad.
-
Plausibility: The WMM is considered more plausible than the Multi-Store Model as it explains short-term memory in terms of both temporary storage and active processing.
-
Case study support: Patient studies, such as that of Patient KF, have provided evidence for the model's components.
-
Neuroimaging evidence: PET scans have shown that different areas of the brain are active while completing visual and verbal tasks, supporting the idea of separate components for different types of information.
Weaknesses of the Working Memory Model
Despite its strengths, the Working Memory Model also has some limitations:
- Limited scope: The model is primarily concerned with short-term memory and doesn't fully explain the transfer of information to long-term memory.
Highlight: A weakness of the Working Memory Model is its focus on short-term memory processes, leaving gaps in our understanding of long-term memory interactions.
-
Lack of research on the Central Executive: There is limited research investigating how the Central Executive works, making it difficult to use this component to explain experimental results.
-
Criticism of the visuospatial sketchpad: Lieberman (1980) pointed out that blind people have spatial memory despite never having had visual information, challenging the visual aspect of this component.
Quote: "Blind people have spatial memory (can remember where things are and not bump into them) though never having had any visual information." - Lieberman (1980)
In conclusion, the Working Memory Model evaluation reveals both strengths and weaknesses. While it provides a more comprehensive explanation of short-term memory processes than previous models, there are still areas that require further research and clarification.
