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The Interplay Between Multisensory Processing and Attention in Working Memory: Behavioral and Neural Indices of
Ceren Arslan1, Daniel Schneider1, Stephan Getzmann1
1Leibniz Research Centre for Working Environment and Human Factors, Dortmund, Germany.
Psychophysiology
|February 21, 2025
Summary
Multisensory working memory automatically integrates audio-visual information, even irrelevant details. However, actively maintaining these irrelevant features requires significant attentional resources during recall.
Area of Science:
- Cognitive Neuroscience
- Psychology
- Sensory Processing
Background:
- Real-world experiences are inherently multisensory.
- The mechanisms of audio-visual object storage in working memory remain unclear.
- Attentional processes influence multisensory interactions at the perceptual level.
Purpose of the Study:
- To investigate the interplay between attention and multisensory processes within working memory.
- To determine how audio-visual information is encoded and maintained under varying attentional demands.
Main Methods:
- An audiovisual delayed match-to-sample task was employed.
- Participants performed the task with instructions to attend to auditory, visual, or both features.
- Behavioral, event-related potential (ERP), and alpha oscillatory activity were analyzed.
Main Results:
- Behavioral data indicated interference from task-irrelevant features, suggesting automatic bottom-up integration.
- ERP analysis showed no active maintenance of irrelevant features but increased attentional load during recall.
- Alpha oscillations revealed heightened attentional demands for cross-modal linking during retrieval.
Conclusions:
- Working memory automatically integrates multisensory information, including task-irrelevant features.
- Task-irrelevant features are encoded but not actively maintained, yet they consume attentional resources.
- Attentional demands increase when linking auditory and visual information in working memory at retrieval.
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