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Published on: August 29, 2018
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Strategic Distractor Suppression Improves Selective Control in Human Vision
Wieske van Zoest1,2, Christoph Huber-Huber2,3, Matthew D Weaver2
1School of Psychology and Centre for Human Brain Health, University of Birmingham, Birmingham B15 2TT, England w.vanzoest@bham.ac.uk c.m.hickey@bham.ac.uk.
Summary
Knowing distractor details proactively suppresses attention to them. This strategic control is linked to alpha band brain activity in the visual cortex, enhancing focus on relevant information.
Area of Science:
- Cognitive Neuroscience
- Visual Attention
Background:
- Limited cognitive capacity necessitates strategic ignoring of visual stimuli.
- Prior research on distractor suppression yielded mixed results, with some studies suggesting foreknowledge paradoxically increases attentional selection.
Purpose of the Study:
- To investigate whether foreknowledge of distractor characteristics enables strategic, proactive distractor suppression.
- To determine the role of alpha (α) band oscillations in this proactive suppression mechanism.
Main Methods:
- Concurrent recording of human electroencephalography (EEG) and eye movements.
- Optimized experimental designs to isolate proactive distractor suppression.
Main Results:
- Foreknowledge of distractors reduced electrophysiological indices of covert attentional selection.
- Reduced overt eye movements towards distractor locations.
- Cue-elicited alpha (α) activity predicted the degree of distractor suppression.
Conclusions:
- Foreknowledge of distractor characteristics improves selective control by enabling proactive suppression.
- Alpha (α) oscillations in the visual cortex reflect the implementation of this strategic attentional control mechanism.
