A couple of months ago, Marisa Murray stepped out to grab a bite to eat with a friend.

The restaurant they chose was busy, and the table they sat at was shoehorned between two large families. They didn’t mind, but as Murray settled in, she found herself paying more attention to the people at the tables beside her than the person at her own.

What caught the clinical psychology student’s eye was that the families were socializing, but not with each other: Everyone, from the children to the grandparents, was nose deep in an electronic device.

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