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Affect bursts: dynamic patterns of facial expression.

Eva G Krumhuber1, Klaus R Scherer1

  • 1Swiss Center for Affective Sciences, University of Geneva.

Emotion (Washington, D.C.)
|June 29, 2011
PubMed
Summary
This summary is machine-generated.

Facial expressions during affect bursts show emotion differentiation but lack fixed patterns. Different facial actions can portray the same emotion, challenging the idea of unique emotional prototypes.

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Area of Science:

  • Psychology
  • Neuroscience
  • Human-Computer Interaction

Background:

  • Affect bursts are synchronized emotional expressions involving facial, vocal, and gestural components.
  • Vocal aspects of affect bursts are well-studied, but facial expressions remain underexplored.

Purpose of the Study:

  • To investigate the facial correlates of affect bursts expressing anger, fear, sadness, joy, and relief.
  • To determine if distinct facial prototypes exist for each emotion.

Main Methods:

  • Utilized the Facial Action Coding System to analyze 59 facial actions.
  • Examined individual facial action units (AUs) and their combinations.
  • Assessed facial expressions within a dimensional approach (valence and arousal).

Main Results:

  • Individual facial action units (AUs) showed some emotion differentiation.
  • Less convergence was observed for specific AU combinations, questioning fixed emotional prototypes.
  • Facial actions appeared in a cumulative-sequential manner with emotion-specific timing.
  • Facial actions significantly varied with emotion valence and arousal, distinguishing joy from relief.

Conclusions:

  • Findings suggest that emotions are not represented by fixed facial prototypes.
  • Each emotion can be expressed through multiple, variable facial action combinations.
  • Facial expressions in affect bursts are dynamic and context-dependent rather than rigidly defined.