Are your friend's Facebook posts ruining your day? Researchers warn highly emotional posts on Facebook can spread through groups and 'infect' users


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Facebook posts can have a dramatic effect on your mood - and spread like wildfire through friends, it has been revealed.

Researchers found that seeing positive posts really did boost people's mood - but that a negative post had the opposite effect.

They say the results even led to users sounding happier or more fed up in their own status updates almost instantly - and seeing fewer emotional posts led to people being less expressive.

Researchers say that reading your friend's Facebook updates can have a major effect on your mood.

Researchers say that reading your friend's Facebook updates can have a major effect on your mood.

HOW THEY DID IT

Researchers reduced the amount of either positive or negative stories that appeared in the news feed of 689,003 randomly selected Facebook users.

Researchers never saw the content of actual posts, per Facebook's data use policy; instead, they counted only the occurrence of positive and negative words in more than 3 million posts with a total of 122 million words.

They report that 4 million of those words were 'positive' and 1.8 million were 'negative'.

The new study by social scientists at Cornell, the University of California, San Francisco (UCSF), and Facebook is the first to suggest that emotions expressed via online social networks influence the moods of others.

 

The researchers reduced the amount of either positive or negative stories that appeared in the news feed of 689,003 randomly selected Facebook users, and found that the so-called 'emotional contagion' effect worked both ways.

'People who had positive content experimentally reduced on their Facebook news feed, for one week, used more negative words in their status updates,' reports Jeff Hancock, professor of communication at Cornell's College of Agriculture and Life Sciences and co-director of its Social Media Lab.

'When news feed negativity was reduced, the opposite pattern occurred: Significantly more positive words were used in peoples' status updates.'

Previous experiments had demonstrated emotional contagion in real-world situations.

Researchers never saw the content of actual posts, per Facebook's data use policy; instead, they counted only the occurrence of positive and negative words in more than 3 million posts with a total of 122 million words.

Researchers say that overall posts were positive - they found that 4 million of those words were 'positive' and 1.8 million were 'negative'.

Researchers say that overall posts were positive - they found that 4 million of those words were 'positive' and 1.8 million were 'negative'.

They report that 4 million of those words were 'positive' and 1.8 million were 'negative'.

Hancock said peoples' emotional expressions on Facebook predicted their friends' emotional expressions, even days later.

'We also observed a withdrawal effect: People who were exposed to fewer emotional posts in their news feed were less expressive overall on the following days,'

Hancock wrote in the paper.
'This observation, and the fact that people were more emotionally positive in response to positive emotion updates from their friends, stands in contrast to theories that suggest viewing positive posts by friends on Facebook may somehow affect us negatively," he added. "In fact, this is the result when people are exposed to less positive content, rather than more."

Hancock plans to direct future research into how expressions of positive and negative emotions influence levels of engagement in other online activities, such as liking and commenting on posts.

He said the findings could have implications for public health.

"Online messages influence our experience of emotions, which may affect a variety of offline behaviors," Hancock said.

The study was funded in part by the James S. McDonnell Foundation and the Army Research Office. Other investigators included Jamie Guillory, a Cornell postdoctoral associate when the project began who now works at the UCSF Center for Tobacco Control Research and Education, and Adam D.I. Kramer of Facebook.



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