Increases in theta CSD power and coherence during a calibrated stop-signal task: implications for goal-conflict...

Area of Science:

• Neuroscience
• Cognitive Psychology
• Psychophysiology

Background:

• Psychologists recognize distinct conflict types, including information processing and goal conflict.
• Understanding the neurological underpinnings of different conflict forms is crucial for differentiating their processing mechanisms.

Purpose of the Study:

• To investigate the electroencephalogram (EEG) differences between high and low goal conflict conditions.
• To compare the neural correlates of goal conflict with those of information processing conflict.
• To explore the relationship between goal conflict-related EEG activity and psychological traits like neuroticism and anxiety.

Main Methods:

• Utilized a calibrated stop-signal task (SST) with 34 participants to induce goal conflict.
• Performed comprehensive EEG analysis, examining scalp-wide current source density (CSD) power and coherence across various frequency bands.
• Employed hierarchical analyses of variance (ANOVAs) and regression analyses to assess EEG changes and their correlations with psychological measures.

Main Results:

• Goal conflict was associated with increased midfrontocentral theta CSD power.
• Scalp-wide coherence increased significantly in theta and delta frequency bands during goal conflict.
• Scalp-wide theta activity positively predicted trait neuroticism.

Conclusions:

• Goal conflict is characterized by increased midfrontocentral theta power and widespread theta-dominated coherence, distinguishing it from information processing conflict.
• The observed theta activity during goal conflict suggests a link to Behavioural Inhibition System (BIS)-driven processes.
• Future research should investigate the role of the BIS and potential anxiolytic drug effects on these goal conflict neural signatures.