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Moods, but not Depression, Found Contagious in Adolescent Social Networks

*The following is excerpted from an online article posted on Phys.org.

New research suggests that both good and bad moods can be 'picked up' from friends, but depression can't.

A team led by the University of Warwick has examined whether friends' moods can affect an individual therefore implying that moods may spread across friendship networks.

The team analysed data from the National Longitudinal Study of Adolescent to Adult Health which incorporates the moods and friendship networks of US adolescents in schools. Their paper Spreading of components of mood in adolescent social networks has been published in the journal Royal Society Open Science. The team's findings imply that mood does spread over friendship networks, as do various different symptoms of depression such as helplessness and loss of interest. However they also found that they also found that the effect from lower or worse mood friends was not strong enough to push the other friends into depression.

Using mathematical modelling they found that having more friends who suffer worse moods is associated with a higher probability of an individual experiencing low moods and a decreased probability of improving. They found the opposite applied to adolescents who had a more positive social circle.

Public health statistics researcher Rob Eyre led the study. He said: "We investigated whether there is evidence for the individual components of mood (such as appetite, tiredness and sleep) spreading through US adolescent friendship networks while adjusting for confounding by modelling the transition probabilities of changing mood state over time.

"Evidence suggests mood may spread from person to person via a process known as social contagion.

"Previous studies have found social support and befriending to be beneficial to mood disorders in adolescents while recent experiments suggest that an individual's emotional state can be affected by exposure to the emotional expressions of social contacts.

The study also helps confirm that there is more to depression than simply low mood. At the individual level, these findings imply that following the evidence-based advice for improving mood, e.g. exercise, sleeping well, and managing stress, can help a teenager's friends as well as themselves. Whilst for depression, friends do not put an individual at risk of illness so a recommended course of action would be to show them support.

Source: Phys.org
https://phys.org/news/2017-09-moods-depression-contagious-adolescent-social.html