[stephengillie]

These are what my happy nieces do.

What is the author's source? A paywalled summarizing study that analyzed data from other studies: http://psycnet.apa.org/doiLanding?doi=10.1037%2Femo0000403

- Was any primary research conducted? You'll have to pay $12 to find out.

[mirimir]

Damn :(

    sci-hub
    •• Search for a proxy to download an article ••
    
    Decreases in Psychological Well-Being Among American
    Adolescents After 2012 and Links to Screen Time During
    the Rise of Smartphone Technology.
    
    Twenge 2018
    
    10.1037 / emo0000403
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