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It's nothing. This study is narrow and shows no changes in cognitive capability, only sleep. A huge longitudinal study has shown screen time has minimal effect on cognitive ability or behavior of kids:

https://www.oii.ox.ac.uk/news-events/no-evidence-screen-time...

There are far worse things in modern culture that are stressing out kids out.

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Do you suppose that study is the final word on topic? Replication is an important part of the scientific process, as are converging lines of evidence.

The study I linked covered 12000 kids across demographics. You can dig through studies all you want there is scant evidence to implicate screen time for anything. And yet parents are so utterly convinced.

We are ignoring the obvious which is that children's anxiety and depression is caused by the same things as adults.

It’s only sleep, something that is not related with mental health, adolescents barely need and they already indulge a lot in

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