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by stevenwoo 1190 days ago
They compared children starting at 12-18 months and ending at 9 years of age. This study would have been unreasonable as far as I understand it until screens got small enough to put in a crib or only include parents who hold their child in their lap while watching television or have a television adjacent to a crib.
1 comments

99% of kids can sit without support at 9.2 months.[0] 97% can crawl by 12 months.[0]

Kids in the 12-18 month range don't stay in the crib or a lap all day.

[0] https://cdn.who.int/media/docs/default-source/child-growth/c...