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Subjectively salient faces differ from emotional faces: ERP evidence.
Anna Żochowska1, Anna Nowicka2
1Laboratory of Language Neurobiology, Nencki Institute of Experimental Biology, Polish Academy of Sciences, 3 Pasteur Street, 02-093, Warsaw, Poland.
Scientific Reports
|February 13, 2024
Summary
The brain processes self-faces and close-other faces differently than happy or neutral faces, with unique neural patterns indicating self-face prioritization. This highlights the importance of subjective relevance in face perception.
Area of Science:
- Cognitive Neuroscience
- Social Psychology
- Neuroscience
Background:
- The self-face is uniquely processed compared to emotional faces.
- It remains unclear if other highly familiar, significant non-self faces (e.g., partner's face) are also differentiated from emotional faces.
- Understanding neural responses to personally relevant faces is crucial for face perception research.
Purpose of the Study:
- To investigate the neural correlates of processing personally-relevant faces (self and close-other) compared to emotional (happy) and neutral faces.
- To examine event-related potential (ERP) differences associated with self-face, close-other's face, happy face, and neutral face stimuli.
- To determine if subjective significance influences face processing beyond emotional content.
Main Methods:
- Event-related potentials (ERPs) were recorded during a simple face detection task.
- Participants viewed faces of themselves, a close-other, happy individuals, and neutral individuals.
- N170, N2, and P3 amplitude differences were analyzed across face conditions using nonparametric cluster-based permutation tests.
Main Results:
- N170 amplitudes showed right-hemisphere dominance but were not modulated by face type.
- Both self-face and close-other's face elicited decreased N2 and increased P3 amplitudes compared to happy and neutral faces.
- The self-face was preferentially processed over the close-other's face, indicated by lower N2 and higher P3 amplitudes.
- Significant neural differences confirmed self-face prioritization over all other faces and close-other's face over happy/neutral faces.
Conclusions:
- The self-face is prioritized in neural processing compared to close-other's, happy, and neutral faces.
- Personally-relevant faces, including the close-other's, are processed differently than emotionally salient (happy) faces.
- Subjective evaluation and personal relevance play a pivotal role in face perception, influencing neural responses beyond basic emotional content.
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