This is the best summary I could come up with:

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The children and their mothers were part of the Japan-based Tohoku Medical Megabank Project Birth and Three-Generation Cohort Study and were recruited from 50 obstetric clinics and hospitals in the Miyagi and Iwate prefectures between July 2013 and March 2017.

Technology use can take time away from interpersonal relationships that nurture social skills since real people are more multidimensional than characters on a screen, Hutton added.

“Also, (with) passive screen viewing that doesn’t have an interactive or physical component, children are more likely to be sedentary and then aren’t able to practice motor skills,” Nagata said.

If children don’t have enough time to play or are handed a tablet to pacify negative emotions, that could prevent the important developmental milestone that is the ability to navigate discomfort.

Additionally, the authors didn’t have details on what children’s screen time involved, and not all forms are equal in their capacity to harm or benefit, experts said.

But what jumpstarts learning is content that helps children apply their knowledge beyond just rote memorization — so they can “navigate the real world, where things are more unpredictable and require more creativity and resilience,” he said.

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