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Emotion
Emotion
Editor: Paula R. Pietromonaco  
Supplemental Material for
Decreases in Psychological Well-Being Among American Adolescents After 2012 and Links to Screen Time During the Rise of Smartphone Technology
Jean M. Twenge, Gabrielle N. Martin, and W. Keith Campbell
Emotion, Vol. 18, No. 6, pp. 765–780


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