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Reward association facilitates distractor suppression in human visual search
Mengyuan Gong1,2,3, Feitong Yang1,4, Sheng Li1,2,3
1Department of Psychology and Beijing Key Laboratory of Behavior and Mental Health, Peking University, 5 Yiheyuan Road, Haidian, Beijing, 10087, China.
The European Journal of Neuroscience
|January 23, 2016
Summary
Actively suppressing high-reward distractors speeds up task performance. This involves enhanced frontal theta oscillations and top-down control, demonstrating a mechanism for overriding reward-driven attention.
Area of Science:
- Cognitive Neuroscience
- Psychology
- Neuroscience
Background:
- Valuable objects can be distracting, yet people need to focus on tasks.
- Attentional capture by reward-associated items is common, but active suppression can alter this.
- Understanding how to control attention towards valuable distractors is crucial for task performance.
Purpose of the Study:
- To investigate the facilitation effect of actively suppressing high-reward distractors.
- To explore the behavioral and neural mechanisms underlying this suppression.
- To determine how working memory and cognitive control interact to modify attentional priority.
Main Methods:
- Participants performed a visual search task with reward-associated distractors.
- Behavioral data (reaction time) were analyzed.
- Electroencephalography (EEG) was used to measure neural activity, specifically frontal theta oscillations and frontal-to-temporal modulation.
Main Results:
- Target selection was significantly faster when distractors were high-reward associated and actively suppressed.
- Increased frontal theta oscillations were observed, suggesting enhanced working memory and cognitive control demands.
- Strengthened top-down modulation from frontal to anterior temporal regions indicated enhanced inhibitory control.
Conclusions:
- Active suppression of high-reward distractors can facilitate task performance.
- This facilitation is mediated by enhanced working memory representation and cognitive control via frontal top-down mechanisms.
- These findings reveal a mechanism for modulating attentional priority by integrating reward information with task demands during active distractor suppression.
