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Emerging Adults Mirror Infants' Emotions and Yawns
Tiffany S Leung1, Guangyu Zeng2, Sarah E Maylott3
1Department of Psychology, University of Miami, Coral Gables, Florida, USA.
Developmental Psychobiology
|August 21, 2024
Summary
Emerging adults unconsciously mirror infants' facial expressions and physiological responses. This innate sensitivity to infant cues, like crying or smiling, suggests an evolutionary basis for caregiving behaviors.
Area of Science:
- Developmental Psychology
- Evolutionary Psychology
- Social Neuroscience
Background:
- Infants' nonverbal expressions are crucial for eliciting caregiving.
- Parental responses to their own infants are well-documented.
- Less is known about general adult reactions to unfamiliar infants' expressions.
Purpose of the Study:
- To investigate if non-parent emerging adults exhibit behavioral and physiological reactions to unfamiliar infants' expressions.
- To determine if these reactions are generalized across different infant emotional states.
Main Methods:
- 84 U.S. emerging adults (18-25 years old) observed video clips of unfamiliar infants.
- Infants displayed crying, smiling, yawning, and neutral expressions.
- Adults' behavioral (facial expressions) and physiological (pupil dilation) responses were measured.
Main Results:
- Adults showed positive facial expressions to infant smiles.
- Adults displayed negative facial expressions and increased pupil dilation to infant cries.
- Increased yawning and pupil dilation were observed when adults viewed infants yawning.
Conclusions:
- Non-parent emerging adults are highly sensitive to unfamiliar infants' expressions.
- Adults naturally mirror infant expressions behaviorally and physiologically.
- This sensitivity may be an evolved mechanism to facilitate infant care.
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