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Facebook secretly experimented with the moods of 700,000 of its users

Facebook secretly experimented with the moods of 700,000 of its users

Above: The Ludovico Technique is performed on Alex in Stanley Kubrick's 'A Clockwork Orange.'

Image Credit: Warner Bros.

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In an experiment it conducted earlier this year, Facebook injected the feeds of nearly 700,000  its (unknowing) users with negative content to see if it would make the posts they wrote more negative.

The researchers believe that it did. The mood of the posts seen in the news feeds of the experiment’s subjects moved like a “contagion” (the researchers’ word, not mine) into the posts of said subjects.

The inverse, too, was true, the researchers say.

Facebook actually messed with the moods of its users, who — allow me to remind you — are Facebook’s bread and butter. Exposing users to the advertisements of Facebook’s partners — on and off Facebook –  is the social media giant’s only real business.

So it’s surprising that Facebook would conduct such experiments, and even more surprising that it would be dumb enough to publish the results. The paper was published in the Proceedings of the National Academy of Sciences (PNAS).

From the paper: "When positive expressions were reduced, people produced fewer positive posts and more negative posts; when negative expressions were reduced, the opposite pattern occurred. These results indicate that emotions expressed by others on Facebook influence our own emotions, constituting experimental evidence for massive-scale contagion via social networks."

But even the PNAS has doubts about the validity of the research outcome. It’s unclear, the PNAS says, whether the negative and positive posts from research subjects were caused only by the manipulation of the news feed, and not by negative interactions with other users.

The research was led by Facebook data scientist Adam Kramer. Here’s what it says at Kramer’s American Psychological Association page: “D.I. Kramer, PhD, has an enviable subject pool: the world’s roughly 500 million [now well more than a billion] Facebook users.”

The other researchers were Cornell University professor Jeff Hancock, and UCSF post-doctoral fellow Jamie Guillory.

The paper says that users provided tacit consent to be used in research studies when they signed up for Facebook and agreed to Facebook's Data Use Policy.

So no legal exposure for Facebook, but definitely some more bad vibes from a company that has demonstrated over and over that the needs of its advertising business always trump the needs of its users.

But this experiment takes Facebook’s disregard to another level, as it actively seeks to harm the wellbeing of users.

Facebook already has plenty of ways to make people unhappy, from its humblebrags to its envy-inducing profiles. Last year a University of Michigan study told us that Facebook makes many young people depressed. Another study, published by Berlin’s Humboldt University, reported that Facebook often fills users with feelings of envy.

And what is the point of this research? Why is it being conducted? Is it purely an academic exercise, or could it be used by some unscrupulous party to mess with people’s feeds and moods on a regular basis?

Facebook should immediately disclose the names of the Facebook users whose feeds it manipulated.

(Big) hat tip: Pando Daily’s David Holmes


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Facebook is the world's largest social network, with over 1.15 billion monthly active users. Facebook was founded by Mark Zuckerberg in February 2004, initially as an exclusive network for Harvard students. It was a huge hit: in 2 w... read more »