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Psychophysiological correlates of face processing in social phobia
Iris-Tatjana Kolassa1, Wolfgang H R Miltner
1Clinical Psychology and Neuropsychology, University of Konstanz, Germany. Iris.Kolassa@uni-konstanz.de
Brain Research
|September 15, 2006
Summary
Social phobics exhibit altered early visual processing of angry faces, specifically showing enhanced right-hemispheric N170 amplitudes. This suggests neural differences in threat detection, despite similar behavioral responses.
Area of Science:
- Neuroscience
- Psychology
- Social Anxiety Research
Background:
- Social phobia is linked to fear of disapproval, often signaled by angry faces.
- Previous research suggests abnormal emotional face processing in social phobia.
Purpose of the Study:
- To investigate electrophysiological correlates of emotional face processing in social phobia.
- To examine how social phobics process angry, happy, and neutral faces.
- To correlate electrophysiological responses with social phobia symptom severity.
Main Methods:
- Utilized a modified emotional Stroop task and an emotion identification task.
- Presented participants with angry, happy, and neutral facial stimuli.
- Measured electrophysiological responses (N170, P1, P2) and heart rate.
Main Results:
- Social phobics showed no differences in reaction time, heart rate, P1, or P2 amplitudes for angry faces.
- Enhanced right temporo-parietal N170 amplitudes were observed in social phobics for angry faces during emotion identification.
- Higher Social Phobia and Anxiety Inventory (SPAI) scores trended with larger N170 amplitudes for angry faces.
Conclusions:
- Social phobics demonstrate abnormalities in early visual processing of angry faces.
- Enhanced right-hemispheric N170 suggests altered neural processing when attention is directed to facial emotion.
- Behavioral and heart rate data did not support preferential processing of angry faces in social phobia.
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