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Reward expectation modulates N2pc for target selection: Electrophysiological evidence
1Beijing Key Laboratory of Learning and Cognition, School of Psychology, Capital Normal University, Beijing, China.
Psychophysiology
|May 1, 2021
Summary
Reward expectation influences attentional focus, enhancing visual search performance when targets are further apart. This study used event-related potentials (ERPs) to track these effects during a cue-target task.
Area of Science:
- Cognitive Neuroscience
- Experimental Psychology
Background:
- Attentional interference effects can impact visual search efficiency.
- Reward expectation is known to modulate cognitive processes, including attention.
Purpose of the Study:
- To investigate how reward expectation affects localized attentional interference.
- To examine the role of target separation in reward-modulated attention using electrophysiology.
Main Methods:
- Electrophysiological recordings of event-related potentials (ERPs) were used.
- A cue-target paradigm with varying reward conditions (incentive vs. non-incentive) and target separations was employed.
- Participants performed a visual search task, identifying shape singletons.
Main Results:
- Behavioral data showed greater reward facilitation with increased target separation.
- The N2pc component revealed an interaction between reward expectation and target separation.
- In non-incentive trials, N2pc amplitude increased with separation; in incentive trials, amplitudes were similar across separations.
Conclusions:
- Reward expectation modulates attentional focus, optimizing target selection under competition.
- The findings suggest reward-driven attention enhances the ability to resolve conflicting visual information.
