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High Working Memory Capacity at the Cost of Precision?
Anne-Katrin Vellage1,2, Patrick Müller3, Marlen Schmicker1
1German Centre of Neurodegenerative Diseases, 39120 Magdeburg, Germany.
Brain Sciences
|August 24, 2019
Summary
Individuals with high working memory capacity (WMC) maintain information precision in demanding tasks. This suggests high WMC individuals efficiently allocate cognitive resources for better working memory (WM) storage.
Area of Science:
- Cognitive Psychology
- Neuroscience
Background:
- Working memory capacity (WMC) exhibits significant individual variability.
- Understanding how high WMC individuals manage cognitive resources is crucial for explaining performance differences.
Purpose of the Study:
- To investigate if high WMC individuals reduce information precision to conserve cognitive resources in demanding tasks.
- To explore the relationship between WMC, task difficulty, and memory precision.
Main Methods:
- A continuous delayed-estimation task was used to assess memory precision.
- Task difficulty was manipulated by increasing the number of objects, delaying relevance information, and adding retrieval distractions.
- Participants were categorized based on their general WMC.
Main Results:
- High WMC individuals did not show a greater decline in precision under difficult conditions.
- A positive correlation was observed between memory precision and general WMC.
- Findings challenge the notion of a quantity-quality trade-off in working memory (WM).
Conclusions:
- High WMC is associated with enhanced ability to maintain memory precision, not by reducing it.
- Individuals with high WMC may allocate more cognitive resources to support working memory (WM) storage.
- This suggests efficient resource allocation underlies superior performance in high WMC individuals.
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