Normative cognition and the effects of a probiotic food intervention in first grade children in Côte d'Ivoire

Area of Science:

• Developmental Psychology
• Nutritional Neuroscience
• Global Child Health

Background:

• Cognitive development research often overlooks low- and middle-income countries, where children face risks to their developmental potential.
• There's a need to explore interventions, like probiotics, to boost cognition in at-risk populations.
• Understanding normative cognitive development is crucial for identifying potential enhancements.

Purpose of the Study:

• To examine normative cognitive development in 4- to 7-year-old children in Côte d'Ivoire.
• To investigate if probiotic fermented dairy food consumption enhances executive functions.
• To assess the feasibility of school-based health interventions in developing nations.

Main Methods:

• A semi-randomized controlled trial involving 251 children aged 4-7 years in urban schools.
• Executive functioning measures administered at baseline (T1) and 5 months later (T2).
• Intervention group received daily probiotic or placebo fermented dairy food; control group continued usual diet.

Main Results:

• All children demonstrated improvement in cognitive tests over the 5-month period (Cohen's d = 0.08-0.30).
• The impact of probiotic ingestion on executive functions was inconclusive.
• Socio-political factors influenced consistent daily probiotic administration, complicating result interpretation.

Conclusions:

• The study highlights general cognitive improvements in children over time.
• Probiotic intervention effects remain uncertain, requiring cautious interpretation.
• The trial's feasibility suggests potential for future research on sustainable, health-promoting interventions for school children in developing countries.