Developmental Changes in the Association Between Heart Rate Variability and Peer Success Across Early Elementary...

Area of Science:

• Child Development
• Psychophysiology
• Social Neuroscience

Background:

• Associations between heart rate variability (HRV) and emotion regulation (ER) are established in adults but inconsistent in children.
• The functional role of baseline HRV in childhood, particularly concerning environmental influences, remains unclear.
• Peer success is a key indicator of age-appropriate ER development in early childhood.

Purpose of the Study:

• To investigate the developmental interplay between baseline HRV, teacher-child closeness, and school year on peer success.
• To test two frameworks: direct ER effects versus environmental sensitivity (ES) effects of HRV.
• To examine how these factors influence children's social development across kindergarten, first, and second grade.

Main Methods:

• A longitudinal study involving 339 children (mean age 66.32 months).
• Data collected across three school years (kindergarten, first, second grade).
• Statistical analysis of a three-way interaction: baseline HRV, teacher-child closeness, and school year predicting peer success.

Main Results:

• Kindergarten findings partially supported the environmental sensitivity (ES) framework.
• First-grade findings tentatively aligned with the emotion regulation (ER) framework.
• The functional meaning of baseline HRV appears to shift developmentally.

Conclusions:

• The implications of baseline HRV for children's social success are context- and age-dependent.
• Environmental sensitivity may be a key function of HRV in early childhood.
• Future research should consider developmental trajectories when examining HRV and social outcomes.