Related Experiment Video
Updated: Aug 7, 2026

A Modified Trier Social Stress Test for Vulnerable Mexican American Adolescents
Published on: July 10, 2017
Children's cortisol levels and quality of child care provision
M Sims1, A Guilfoyle, T S Parry
1School of International, Cultural and Community Studies Joondalup Campus, Edith Cowan University, Joondalup, WA, Australia. m.sims@ecu.edu.au
Insights
Child care quality impacts children's stress levels. High-quality programs are linked to lower cortisol, while unsatisfactory ones show increased stress throughout the day.
Area of Science:
- Pediatric Health
- Child Development
- Stress Physiology
Background:
- Cortisol levels serve as a key indicator of physiological stress.
- Child care settings may present a risk factor for adverse child outcomes due to elevated cortisol.
- The quality of child care environments is hypothesized to influence child outcomes.
Purpose of the Study:
- To investigate the relationship between child care quality and children's cortisol levels.
- To determine if cortisol levels differ based on the quality of the child care program and time of day.
Main Methods:
- Salivary cortisol was measured in children aged 3-5 years attending long-day care centers.
- Child care program quality was assessed using national quality assurance indicators.
- A split-plot ANOVA with repeated measures analyzed cortisol levels across different quality levels and times of day.
Main Results:
- Children in high-quality child care programs showed a decrease in cortisol levels throughout the day.
- Children in unsatisfactory child care programs exhibited an increase in cortisol levels during the day.
Conclusions:
- High-quality child care is crucial for mitigating stress in young children.
- Further research is needed to establish specific cortisol level thresholds associated with increased risk.
- Emphasizing high-quality care is essential for promoting positive child development outcomes.
Background:
Cortisol levels are increasingly being used as an indicator of stress levels. Research suggests that children who attend child care demonstrate higher cortisol levels than children in their homes, suggesting that child care acts as a risk factor for poor child outcomes. However, it is also suggested that quality influences outcomes.
Methods:
Cortisol levels were measured through samples of saliva taken from children (3-5 years of age) attending long-day care centres in Perth, Western Australia. Quality of the programme was measured using industry national quality assurance indicators designed for child care centres. The analysis employed a 2 (time of collection: average am cortisol, average pm cortisol) by 3 (centre quality: high, satisfactory, unsatisfactory) split plot ANOVA with repeated measures on the time factor.
Results:
Cortisol levels of children attending high-quality programmes demonstrated a decline across the child care day. Levels in children attending unsatisfactory programmes demonstrated an increase across the day.
Conclusions:
Although we do not yet know how high, and for how long, cortisol levels need to be elevated for risk of undesirable outcomes to increase, this research signals the importance of emphasizing the need for high-quality care for young children.
Related Concept Videos
Socioemotional Development during Infancy
Primary Temperament Types
Stella Chess...
Parenting Styles
Authoritarian Parenting
This style is strict and controlling, with little room for open dialogue. Authoritarian parents demand obedience and often enforce rules with minimal warmth. Children raised this way may lack social skills and initiative, usually comparing themselves to others unfavorably.
Authoritative Parenting
This...
Relationship with Parents: Attachment
Nature and Nurture
Parental Care
Environmental Influences on Intelligence

