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Infants' perception of dynamic affective expressions: do infants distinguish specific expressions?

N H Soken1, A D Pick

  • 1University of Minnesota, Minneapolis, USA.

Child Development
|January 6, 2000
PubMed

Insights

Seven-month-old infants can differentiate between happy, interested, angry, and sad expressions. This study shows early infant perception of dynamic affective facial and vocal cues.

Area of Science:

  • Developmental Psychology
  • Infant Perception
  • Emotional Development

Background:

  • Understanding infant perception of emotions is crucial for grasping early social-cognitive development.
  • Previous research indicates infants can perceive basic emotional expressions, but differentiation among specific dynamic expressions requires further investigation.

Purpose of the Study:

  • To investigate 7-month-old infants' ability to discriminate between positive (happy, interested) and negative (angry, sad) affective facial and vocal expressions.
  • To determine if infants can differentiate specific, dynamic emotional expressions when presented with audiovisual stimuli.

Main Methods:

  • A preferential looking procedure was employed with 120 seven-month-old infants across six conditions.
  • Infants viewed pairs of videotaped facial expressions while hearing a single, synchronized or unsynchronized vocal expression.
  • Visual fixations to affectively concordant and discordant displays were recorded to measure discrimination.

Main Results:

  • Infants looked longer at affectively concordant displays (matching face and voice) than discordant ones in most conditions.
  • Discrimination was evident even when stimuli were presented out of synchrony, suggesting robust perception.
  • Specific discrimination was observed between happy/interested expressions and sad expressions.

Conclusions:

  • Seven-month-old infants demonstrate the ability to discriminate among happy, interested, angry, and sad expressions.
  • This indicates a differentiation of specific, dynamic affective expressions during infancy.
  • Findings suggest that infants utilize both facial and vocal cues, with familiarity potentially playing a role in refining this differentiation.

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