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Reducing State Anxiety Using Working Memory Maintenance
Published on: July 19, 2017
The contents of visual working memory reduce uncertainty during visual search
Joshua D Cosman1, Shaun P Vecera
1Department of Neuroscience, University of Iowa, Iowa City, IA, 52242-1407, USA. joshua-cosman@uiowa.edu
Attention, Perception & Psychophysics
|February 3, 2011
Summary
Visual working memory (VWM) aids visual search by reducing uncertainty, particularly in complex displays. Information in VWM helps locate targets among distractors, improving search efficiency.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Visual Perception
Background:
- Visual working memory (VWM) influences attention and processing during visual search.
- Matching VWM content with targets typically yields processing benefits.
- Potential mechanisms include perceptual enhancement or postperceptual uncertainty reduction.
Purpose of the Study:
- To investigate the precise mechanism by which VWM influences visual search.
- To differentiate between perceptual enhancement and uncertainty reduction models.
- To examine the role of VWM under varying display complexities (set sizes).
Main Methods:
- Participants performed visual search tasks with briefly presented, masked targets.
- Target discrimination was assessed in isolation and within multi-item displays.
- The influence of VWM content on target detection was measured across different set sizes.
Main Results:
- VWM had a negligible effect on target discrimination when targets were presented in isolation.
- VWM significantly influenced target discrimination in displays with multiple items (larger set sizes).
- These findings suggest a postperceptual role for VWM in visual search.
Conclusions:
- Working memory representations primarily function at a postperceptual level.
- VWM aids visual search by reducing uncertainty about target location, especially in cluttered scenes.
- The results support uncertainty reduction models over simple perceptual enhancement accounts.
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