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Related Experiment Videos

What's in a smile?

D S Messinger1, A Fogel, K L Dickson

  • 1Department of Psychology, University of Miami, Coral Gables, Florida 33101-0721, USA. dmessinger@miami.edu

Developmental Psychology
|June 25, 1999
PubMed
Summary
This summary is machine-generated.

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Infant Duchenne smiles and non-Duchenne smiles often signal similar emotions and develop together. However, infant Duchenne smiles last longer than non-Duchenne smiles, differing from adult emotional expressions.

Area of Science:

  • Developmental Psychology
  • Infant Behavior
  • Emotional Expression

Background:

  • Adults and older infants display more Duchenne smiles than non-Duchenne smiles in positive social settings.
  • The emotional significance of Duchenne versus non-Duchenne smiles in early infancy requires further investigation.

Purpose of the Study:

  • To compare Duchenne and non-Duchenne smiles in early infancy.
  • To explore the emotional significance of different infant smile types.

Main Methods:

  • 13 infants aged 1-6 months were videotaped during mother-infant interactions.
  • Duchenne and non-Duchenne smiling levels were correlated within sessions.
  • Smile durations and developmental trajectories were analyzed.

Related Experiment Videos

Main Results:

  • Duchenne and non-Duchenne smiles showed similar developmental trajectories.
  • Non-Duchenne smiles frequently preceded Duchenne smiles within interactive sessions.
  • Infant Duchenne smiles were longer in duration compared to non-Duchenne smiles.

Conclusions:

  • Infant Duchenne and non-Duchenne smiles may represent temporal phases of a continuous emotional process.
  • Infant smiling patterns, particularly Duchenne smile duration, differ from adult models of emotional functioning.