Facebook has apologized for secret experiments on users of the social network. Facebook secretly manipulated by their own emotions users to approve the assumption of their "contagion rates". Deputy Mark Zuckerberg Sheryl Sandberg publicly apologized to all users of the social network for conducting secret psychological test, participants unwittingly became 700 thousand users. This information has caused a wave of indignation and a scandal among active users of Online communities. "It was part of a long-term research conducted by the company to try out fresh food, all because of a flaw communications said in new Delhi Sheryl Sandberg - 2nd ranking employee of Facebook. For this we bring their own apologies. We by no means did not want to upset you," he said, employee RT. Remember that the psychological analysis Facebook lasted for one week in early January 2012. The essence of the experience contained in the separation of positive and negative news. Of the test subjects in their own news feed observed the increase of negative news, and the other opposite the tape has become more positive, than usually. "When the number of positive phrases were reduced, people rarely published positive status before from news feeds removed the negative entries, it would give a different result. The results of the experience suggests that the experiences expressed by people in Facebook, act on our own," said the authors of published research Institute Cornell and California. It should be noted that most angered the population that the study was conducted without their knowledge. Psychological experience Facebook has caused a storm of indignation among users, and was called the "evil" and even "terrible". "We conducted this study to know what a sensual effect does Facebook on their own users, reports on own page in social network Adam Kramer, 1-author of the study. "We tried to prove or to refute the widespread belief that the positive experience in positions 1 users evoke a sense of disorder or loneliness other. In addition we wanted to find out whether the negative impressions from friends to force a user to leave Facebook". It should be noted that there is an opinion that the safe with a kind experience relevant to the project of the Pentagon called Minerva Initiative. In the framework of various institutions receive funding for large-scale study of public opinion, attitudes and social concerns around the world.