Early Stimulation and Enhanced Preschool: A Randomized Trial.

Area of Science:

• Child Development
• Early Intervention Programs
• Educational Psychology

Background:

• Early childhood development is crucial for long-term outcomes.
• Interventions like early stimulation (ES) and enhanced preschool (EP) aim to improve cognitive and social skills.
• Understanding the combined and individual impacts of these interventions is essential for effective policy.

Purpose of the Study:

• To estimate the impacts of early stimulation (ES) for children under 3 years and enhanced preschool (EP) for children 3 years and older.
• To investigate the interaction effects between ES and EP on child development outcomes.
• To assess the sustained effects of these interventions over time.

Main Methods:

• A cluster randomized trial was conducted in 192 villages in Odisha, India.
• Children received either ES, EP, both, or no intervention.
• Primary outcomes included IQ and school readiness, measured after approximately one year.

Main Results:

• Both ES and EP significantly improved children's IQ and school readiness.
• The positive effects of ES alone on IQ and school readiness were sustained for 15 months.
• Enhanced preschool (EP) alone showed considerable catch-up effects for children not receiving ES.

Conclusions:

• Both early stimulation and enhanced preschool are effective in improving child development outcomes.
• The sustained impact of early stimulation and the catch-up effect of enhanced preschool highlight their individual importance.
• Further research is needed to understand the lack of significant interaction effects, which has major policy implications for early childhood education and care.