Recently, some social media users have been in an uproar after Facebook admitted to carrying out a secret experiment in which the news feeds of more than 600,000 users were filtered to see if those individuals would have differing emotions based upon what they saw on the screen. For example, it was determined if a person was exposed to more positive news from friends, he or she would be less likely to post something negative as a status update. The opposite was also found to be true.
“Massive-Scale Emotional Contagion”
On a smaller scale, most of us are already familiar with this phenomenon. Spending time with a friend who is in an abundantly good mood probably makes you feel similar, even if you were previously feeling a little down in the dumps.