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The problem
Intervention: None - this is an observational longitudinal study examining the natural relationship between play ability and school outcomes
Who it was tested with: 157 first-grade children in Russia (52% boys), assessed initially at age 5 and followed to age 7.
Children or communities are compared with a group that did not receive the intervention, or followed over years. This is the design that best separates what the intervention did from everything else that changed.
"A hierarchical regression analysis revealed that the inability to play alone at age 5 significantly predicted lower overall school adaptation at age 7 (β = -0.107, p = 0.034)...and, notably, lower academic engagement (β = -0.244, p = 0.003), after controlling for the child's sex, age, language proficiency, nonverbal intelligence, maternal education and family income." This longitudinal design with statistical control of confounders provides stronger evidence than a simple cross-sectional correlation, but the study is observational and does not test whether improving play would improve school outcomes.
The study cannot determine causation or identify mechanisms. It is context-specific to Russian schooling. The measure of play (ability to play alone) is limited; the study does not evaluate interventions to improve play or school adaptation.
Across countries and designs
50 studies · 32 countries
