Understanding relations among early family environment, cortisol response, and child aggression via a prevention...

Area of Science:

• Developmental Psychology
• Behavioral Neuroscience
• Child Psychiatry

Background:

• Family environment significantly influences child development and behavior.
• Cortisol response, a biomarker of stress, is implicated in behavioral regulation.
• Children at risk for antisocial behavior often exhibit altered stress reactivity.

Purpose of the Study:

• To investigate the relationship between family environment, cortisol response, and behavior in children at risk for antisocial behavior.
• To determine if changes in cortisol response mediate the intervention's effect on child aggression.
• To explore the role of cortisol response in intervention-related changes in child engaging behavior.

Main Methods:

• A randomized controlled trial involving 92 children (mean age 48 months) at risk for antisocial behavior.
• Assessment of family environment, cortisol response to a social challenge, and child behavior (aggression, engaging behavior).
• Mediation analysis to examine the role of cortisol response in intervention effects.

Main Results:

• The intervention significantly reduced aggression in children from lower warmth families.
• This reduction in aggression was largely mediated by a decrease in cortisol response.
• While the intervention improved engaging behavior, cortisol response did not mediate this outcome.

Conclusions:

• Cortisol response is a significant mediator linking interventions to reduced aggression in at-risk children, particularly within low-warmth family environments.
• Findings underscore the importance of considering both family context and physiological stress responses in addressing child antisocial behavior.
• The study provides evidence for the utility of interventions targeting stress regulation to improve behavioral outcomes in vulnerable children.