Rewarded visual items capture attention only in heterogeneous contexts.

Area of Science:

• Cognitive Neuroscience
• Visual Attention Research

Background:

• Reward significantly influences visual search performance, with rewarding targets enhancing and rewarding distractors impairing performance.
• Understanding the distinct neural processing of targets and distractors under reward is crucial for dissecting attentional mechanisms.

Purpose of the Study:

• To investigate the impact of reward magnitude on distractor processing and attentional capture during visual search.
• To differentiate the effects of reward on target selection versus distractor interference using electroencephalography (EEG).

Main Methods:

• Employed a visual search task with homogeneous and heterogeneous contexts, embedding a target and a colored distractor.
• Utilized event-related EEG to measure neural correlates of attention, specifically the N2pc subcomponents (NT, ND/PD).
• Participants received monetary rewards based on distractor color after correct trials.

Main Results:

• High-reward distractors led to longer response times and impaired target selection (NT component) irrespective of context.
• Reward-induced interference was observed only in heterogeneous contexts.
• High-reward distractors captured attention (ND component) and demanded greater suppression (PD component) specifically in heterogeneous contexts.

Conclusions:

• High-reward distractors universally impair target selection, but attentional capture is context-dependent.
• Reward effects on attentional capture are modulated by the visual search environment's complexity.
• Findings elucidate the interplay between reward, attention, and context in visual information processing.