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The problem
Intervention: Block play intervention in two conditions: free play (15-minute small group sessions twice weekly for 8 weeks) and semi-structured play with picture prompts (same frequency and duration)
Who it was tested with: 142 preschoolers, mean age 54 months, randomly assigned to conditions.
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.
"Data were drawn from a large block play intervention study that included three conditions: free play, semi-structured, and business-as-usual (BAU)... The present sample focused on 142 preschoolers... who were randomly assigned to the free play and semi-structured conditions." This represents a randomised experimental design comparing two intervention approaches, meeting the criteria for EXPERIMENTAL tier.
Study design does not clearly specify whether building complexity was the primary outcome or secondary analysis. The document does not provide effect sizes or statistical significance levels for most findings. Long-term follow-up outcomes are not reported.
Across countries and designs
1 study · 0 countries
A reviewer checked the classification against the source.
claude-haiku-4-5-20251001 · synth-v1
