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The import of the cortisol rise in child care differs as a function of behavioral inhibition
Megan R Gunnar1, Erin Kryzer, Mark J Van Ryzin
1Institute of Child Development, University of Minnesota, Twin Cities, Minneapolis, MN 55455, USA. Gunnar@umn.edu
Insights
A child's cortisol rise in childcare is linked to anxious behavior and internalizing symptoms, especially in children with high behavioral inhibition. Temperament influences how stress responses in early childhood affect later emotional well-being.
Area of Science:
- Developmental Psychology
- Child Psychology
- Stress Response Research
Background:
- Childcare environments can elicit physiological stress responses in young children.
- Understanding the link between early stress and later behavioral outcomes is crucial for child development.
- Behavioral inhibition is a temperamental trait associated with sensitivity to stress.
Purpose of the Study:
- To investigate the association between cortisol rise in childcare and child outcomes.
- To examine the moderating role of behavioral inhibition in this association.
- To determine if cortisol changes predict anxious behavior and internalizing symptoms.
Main Methods:
- Longitudinal study of 107 children aged 3 to 4.5 years, assessed twice over 6 months.
- Measured cortisol levels in response to childcare.
- Assessed anxious, vigilant behavior and internalizing symptoms, controlling for home environment and childcare quality.
Main Results:
- Cortisol rise in childcare predicted increased anxious behavior and internalizing symptoms, particularly in children with high behavioral inhibition.
- Children with high behavioral inhibition and low initial cortisol showed reduced anxious behavior.
- Temperament, specifically behavioral inhibition, moderated the impact of childcare stress on child outcomes.
Conclusions:
- The rise in cortisol during childcare has differential predictive value based on a child's temperament.
- Behaviorally inhibited children may be more vulnerable to the negative effects of childcare-related stress.
- Early stress responses and temperament interact to shape child emotional and behavioral development.
Abstract:
Children of ages 3 to 4.5 years (N = 107; 45 boys, 62 girls) were studied twice, 6 months apart, to examine whether the cortisol rise in child care at Time 1 (T1) was associated with (a) changes in anxious, vigilant behavior from T1 to Time 2 (T2) and (b) higher internalizing symptoms at T2. Controlling for measures of home environment and child care quality at T1, as well as for cortisol activity at T2, we obtained results indicating that behavioral inhibition moderated the associations between the rise in cortisol at T1 and child outcomes at T2 (i.e., anxious, vigilant behavior and internalizing symptoms). For both outcomes, the rise in cortisol at T1 became more positively predictive at increasing levels of behavioral inhibition. Specifically, at higher levels of behavioral inhibition, children with larger T1 cortisol increases expressed more internalizing symptoms than did children at lower levels of behavioral inhibition; in contrast, for those with low cortisol activity at T1, children with higher levels of inhibition expressed fewer internalizing symptoms than did children at lower levels of inhibition. In addition, children with higher levels of behavioral inhibition and lower cortisol activity at T1 exhibited reductions in anxious, vigilant behavior from T1 to T2, whereas at lower levels of behavioral inhibition, variations in the T1 cortisol rise bore no relation to changes in this behavior. These results suggest that the rise in cortisol at child care may have differential predictive value as a function of behaviorally inhibited temperament.
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