"Given what we know about adolescent development and vulnerability and the intensive need for intimate and healthy social connection during these years, you can see how social media may not be developmentally appropriate," she said.
Tennessee editorial roundup
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Jean Twenge, a psychology professor at San Diego State who has studied the issue, said it's no coincidence that youth mental health issues have risen with the number of phones.
Schools reckon with social stress: 'I'm on my phone so much'
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