American researchers have attempted to determine if being addicted to one's smartphone can lead to depression or if people who are subject to depressive symptoms are more vulnerable to this type of addiction.

In recent years, studies showing a link between smartphone addiction and depression, especially in adolescents, are legion. But is it our tendency to stare into our phones that contributes to depression or the reverse? Does the connection occur in both directions? Researchers at the University of Arizona have been investigating these questions.