Trait Anxiety Modulates Event-Related Potential Responses to Emotional Faces.

Area of Science:

• Neuroscience
• Psychology
• Cognitive Science

Background:

• Trait anxiety is linked to anxiety and depression, typically measured by the State-Trait Anxiety Inventory (STAI).
• Self-report measures like STAI have limitations, including social desirability bias.
• Investigating neural signatures offers a more objective approach to understanding trait anxiety.

Purpose of the Study:

• To explore the neural correlates of trait anxiety using event-related potentials (ERPs).
• To examine attentional biases towards emotional stimuli in individuals with varying levels of trait anxiety.
• To identify objective neural markers for trait anxiety assessment.

Main Methods:

• Utilized a 19-channel electroencephalography (EEG) recording during an emotional Stroop task.
• Healthy adults (n=11) completed the STAI and responded to angry, disgusted, and neutral facial stimuli.
• Analyzed event-related potentials (ERPs), specifically N170 and P200 components.

Main Results:

• Low anxiety participants showed reduced N170 amplitude and delayed latency to angry faces.
• High anxiety participants exhibited no significant N170 difference, but a greater amplitude difference (angry minus neutral), indicating attentional bias.
• High anxiety was associated with reduced P200 to angry faces and enhanced P200 to disgusted faces, with P200 changes correlating with STAI scores.

Conclusions:

• ERPs, particularly N170 and P200 components, serve as valuable neural markers for trait anxiety.
• Attentional biases towards negative emotional stimuli are reflected in distinct ERP patterns.
• Findings support the development of objective neurophysiological measures for anxiety assessment and intervention.