The modulation of the Ne-like wave on correct responses foreshadows errors

Area of Science:

• Cognitive Neuroscience
• Electrophysiology

Background:

• Event-related potentials (ERPs) in reaction time (RT) tasks show a response-locked negative wave (error negativity, Ne/ERN) during errors, believed to reflect response monitoring.
• This Ne wave is typically obscured by a positive wave in standard monopolar recordings, making it difficult to detect in correct responses.

Purpose of the Study:

• To investigate the presence and nature of the Ne-like wave in correct responses using Laplacian transformation.
• To determine if the Ne-like wave in correct responses is sensitive to subsequent performance, indicating its role in response monitoring.

Main Methods:

• Utilized Laplacian transformation, a spatial filtering technique, on electroencephalography (EEG) data from RT tasks.
• Analyzed ERPs, specifically focusing on the response-locked Ne-like wave in both error and correct trials, including those preceding errors.

Main Results:

• Laplacian transformation revealed a small Ne-like wave in correct responses that is not apparent with conventional monopolar recordings.
• This Ne-like wave was found to decrease in correct responses that were followed by an error, compared to correct responses followed by another correct response.
• The observed modulation of the Ne-like wave suggests its sensitivity to performance and potential involvement in ongoing response monitoring.

Conclusions:

• The error negativity (Ne) wave is not exclusive to errors but also appears in correct responses, particularly when an error is imminent.
• These findings support the hypothesis that the Ne wave is a crucial neural marker for continuous response monitoring and performance adjustment.