Thirty-six weeks behaviour day

United States, 1935

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The infant boy whose behaviour day at 12 weeks was charted is now 36 weeks old. His reactions are compared with those which he experienced 24 weeks earlier. His responses to the ministrations of his father and mother are commented upon. The very first successful crawling efforts are observed.

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production company

Encyclopaedia Britannica Films


Arnold Gesell



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United States
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