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The own-sex effect in facial expression recognition
Hirokazu Doi1, Takaaki Amamoto, Yuuka Okishige
1Department of Neurobiology and Behavior, Unit of Basic Medical Sciences, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.
Neuroreport
|April 14, 2010
Summary
Facial expression recognition is influenced by viewer and expresser sex. Neural processing shows differences in how we perceive own-sex versus opposite-sex faces, impacting cognitive evaluation.
Area of Science:
- Psychology
- Neuroscience
- Social Cognition
Background:
- Facial expression recognition is fundamental to social interaction.
- Previous research suggests sex influences social perception.
- The specific neural mechanisms underlying sex effects in expression recognition are not fully understood.
Purpose of the Study:
- To investigate how the sex of both the viewer and the expresser modulates neural responses during facial expression recognition.
- To determine the specific stage of neural processing affected by these sex interactions.
Main Methods:
- Event-related potentials (ERPs) were measured in participants viewing smiling and nonsmiling facial expressions.
- Stimuli included faces expressing neutral and smiling expressions, presented by both same-sex and opposite-sex expressers.
- Analysis focused on specific ERP components, particularly the late positive component.
Main Results:
- The late positive component showed a significantly larger amplitude when participants viewed neutral expressions from own-sex faces compared to opposite-sex faces.
- This finding indicates a modulation of neural processing based on the sex of both the viewer and the expresser.
Conclusions:
- Neural correlates of facial expression recognition are influenced by the sexes of both viewer and expresser.
- These sex-based modulations occur at the cognitive evaluation stage of processing.
- Understanding these effects is crucial for comprehending social cognition and intergroup perception.
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