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Search asymmetries with real faces: testing the anger-superiority effect.
Gernot Horstmann1, Andrea Bauland
1Department of Psychology, Bielefeld University, Bielefeld, Germany. gernot.horstmann@uni-bielefeld.de
Emotion (Washington, D.C.)
|June 14, 2006
Summary
Angry faces are detected faster than friendly faces, supporting the anger-superiority hypothesis. This effect is linked to facial features, particularly the mouth, suggesting a visual system bias.
Area of Science:
- Cognitive Psychology
- Visual Perception
- Social Neuroscience
Background:
- The anger-superiority hypothesis posits faster detection of angry faces over friendly ones.
- Previous studies used artificial stimuli, limiting real-world applicability.
- This research addresses ecological validity by using realistic facial stimuli.
Purpose of the Study:
- To test the anger-superiority hypothesis using ecologically valid stimuli.
- To investigate the specific facial features responsible for the anger advantage.
- To explore the perceptual basis of threat detection in facial expressions.
Main Methods:
- Employed a search-asymmetry design with carefully controlled photographs of faces.
- Conducted four experiments varying facial expressions and orientations.
- Utilized upright and inverted Thatcherized faces to assess perceptual processing.
Main Results:
- Demonstrated more efficient detection of angry faces among happy faces compared to the reverse.
- Identified the mouth, not the eyes, as the primary driver of this advantage.
- Evidence suggests a perceptual basis for the anger advantage, supporting a sensory bias.
Conclusions:
- Angry faces are indeed detected more efficiently than friendly faces in realistic settings.
- Facial expression detection may exploit pre-existing visual system capabilities.
- This sensory bias likely evolved to facilitate rapid threat detection.