Second-by-second infant and mother emotion regulation and coregulation processes

Area of Science:

• Developmental Psychology
• Psychophysiology
• Infant Behavior

Background:

• Context-appropriate infant physiological functioning is crucial for emotion regulation and mother-infant co-regulation.
• Understanding the interplay between infant physiology and dyadic emotional dynamics is essential for early development.

Purpose of the Study:

• To examine how within-infant vagal functioning (respiratory sinus arrhythmia - RSA) explains differences in mother-infant emotion regulation and co-regulation.
• To investigate the relationship between infant RSA mean and variability and their emotion regulation patterns during free play.

Main Methods:

• Dynamic structural equation modeling (DSEM) was employed with 210 low-income Mexican-origin mother-infant dyads.
• Infant vagal functioning was assessed via respiratory sinus arrhythmia (RSA) mean and variability.
• Infant emotion regulation and dyadic co-regulation were quantified second-by-second during free play.

Main Results:

• Infants with lower RSA variability showed more stable positive affect and less stable negative affect, with positive affect dampening subsequent negative affect.
• Higher mean RSA in infants was associated with greater positive affect volatility, distinct positive-negative affect feedback loops, and enhanced mother-driven co-regulation.
• The study revealed distinct patterns of biological and emotional regulation occurring simultaneously.

Conclusions:

• Infant vagal functioning, specifically RSA, plays a significant role in shaping individual emotion regulation and mother-infant co-regulatory dynamics.
• These findings underscore the intricate connection between physiological states and socio-emotional development in infancy.
• Tailoring interventions based on infant physiological profiles may enhance emotion regulation and dyadic interactions.