Sleep deprivation influences drug use in teens' social networks

Recent studies have shown that behaviours such as happiness, obesity, smoking and altruism are 'contagious' within adult social networks. In other words, your behaviour not only influences your friends, but also their friends and so on. Researchers at the University of California, San Diego and Harvard University have taken this a step farther and found that the spread of one behaviour in social networks - in this case, poor sleep patterns - influences the spread of another behaviour, adolescent drug use...

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