Teenage screen addicts lose out on happiness, study shows
Psychologists in the US analysed data from the Monitoring the Future longitudinal study, a major survey looking at the lives of more than a million young people.
They found that playing computer games, using social media, texting and video chatting were all associated with less happiness.
Adolescents who invested more time in non-screen activities such as playing sport, reading newspapers and face-to-face social interaction were significantly happier.