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Dynamic facial trustworthiness perception in real-time social contexts.

Haoming Qi1, Dongcheng He2,3

  • 1School of Information Network Security, People's Public Security University of China, Beijing, China.

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Facial trustworthiness perception involves dynamic brain activity, showing hemispheric asymmetry in observers during real-time social interactions. This suggests dynamic affective processing influences trust judgments beyond static facial cues.

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Area of Science:

  • Neuroscience
  • Social Psychology
  • Cognitive Science

Background:

  • Facial trustworthiness perception research traditionally relies on static stimuli.
  • Real-life social interactions are dynamic, and their neural underpinnings are less understood.

Purpose of the Study:

  • To investigate the neural mechanisms of facial trustworthiness perception in a dynamic, real-time social context.
  • To analyze electroencephalography (EEG) data during a deception game to understand observer trust judgments.

Main Methods:

  • EEG data from observers judging player trustworthiness in a real-time deception game were analyzed.
  • Examined behavioral data, event-related potentials, and interhemispheric EEG asymmetries (signal magnitude and phase).

Main Results:

  • Significant trustworthiness effects on hemispheric asymmetry in centroparietal phase activity were observed from ~800 ms to 3000 ms post-stimulus.
  • Frequency-based analysis indicated lateralized signal frequency drove this phase asymmetry.

Conclusions:

  • Facial trustworthiness perception is associated with dynamic hemispheric lateralization.
  • Dynamic affective processing in real-time social contexts modulates trustworthiness perception, contrasting with rapid perception from static stimuli.