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Updating of information in working memory: Time course and consequences
Chenyu Li1, Gidon T Frischkorn1, Klaus Oberauer1
1Department of Psychology, Cognitive Psychology, University of Zurich, Switzerland.
Cognitive Psychology
|December 21, 2024
Summary
Working memory updating involves removing old and adding new information. This study found that these removal and encoding processes occur simultaneously, not sequentially, for efficient working memory function.
Area of Science:
- Cognitive Psychology
- Neuroscience
Background:
- Working memory updating replaces outdated information with new content.
- The temporal relationship between removal and encoding processes is not well understood.
Purpose of the Study:
- To investigate whether removal and encoding processes in working memory updating occur sequentially or simultaneously.
- To determine the time course and effects of these processes on working memory performance.
Main Methods:
- Two experiments were conducted using a working memory updating task with distinct encoding, processing, and retrieval phases.
- Experiment 1 used self-paced processing time, while Experiment 2 manipulated available processing time and measured accuracy.
- A memory measurement model analyzed response proportions and error types.
Main Results:
- Updating time was shorter than the combined time for separate encoding and removal.
- Updating time was comparable to the time for either encoding or removal alone, suggesting concurrent processing.
- Removal involves unbinding information from its context, but outdated information remains activated.
Conclusions:
- Encoding and removal are concurrent processes during working memory updating.
- Outdated information remains activated post-removal, with limited benefit to other working memory content.
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