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Related Experiment Video

Updated: Jul 6, 2026

Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control
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Reward-modulated attention deployment is driven by suppression, not attentional capture.

Emily D Taylor1, Tobias Feldmann-Wüstefeld2

  • 1School of Psychology, University of Southampton, Southampton, UK.

Neuroimage
|September 5, 2024
PubMed
Summary

High-value distractors interfere with visual search by demanding more suppression, not capture. Increased suppression of valuable stimuli helps prevent attentional capture during visual search tasks.

Keywords:
Attentional captureN2pcPdRewardSuppressionVisual attentionVisual search

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Area of Science:

  • Cognitive Neuroscience
  • Visual Attention
  • Reward Processing

Background:

  • Stimulus value, learned through experience, influences attention.
  • High-reward distractors in visual search tasks cause interference, leading to longer response times and lower accuracy.
  • The neural mechanisms underlying value-driven attention, specifically the roles of enhancement, capture, and suppression, remain unclear.

Purpose of the Study:

  • To investigate the neural mechanisms of value-driven attention deployment during visual search.
  • To determine whether interference from high-reward distractors is due to enhanced processing of targets, attentional capture by distractors, or suppression of distractors.
  • To examine the interplay between distractor value, spatial proximity, and attentional processes.

Main Methods:

  • Replicated behavioral findings of reward-induced interference in a visual search task.
  • Analyzed event-related potentials (ERPs) from EEG signals to assess neural activity.
  • Measured the effects of distractor reward value and spatial proximity on behavioral performance and neural components like Pd and N2pc.

Main Results:

  • Behavioral performance decreased with increasing distractor-target proximity, a gradient steeper for high-reward distractors.
  • High-reward distractors elicited larger Pd components, indicating increased suppression needs, particularly for distractors near targets.
  • Target-N2pc amplitudes were reduced by high-reward distractors near targets, suggesting fewer attentional resources allocated to the target.
  • Distractor-N2pc, reflecting attentional capture, was unaffected by reward or distance.

Conclusions:

  • Value-driven attentional interference arises primarily from the increased need to suppress high-value distractors, rather than attentional capture.
  • Effective suppression of high-value stimuli is crucial for preventing unwanted attentional capture and maintaining efficient visual search.
  • These findings elucidate the neural basis of how reward value modulates attention and highlight the critical role of suppression in managing competing stimuli.