The More We Protect, the More We Reveal, According to New CMU Research

Mar 06, 2013


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Study: Facebook Users More Protective Even as They Reveal More About Themselves

Facebook users became much more protective about who sees sensitive information about them, even as they were urged to share more about themselves on the social network, according to an unusual seven-year study by researchers at Carnegie Mellon University.

The study followed the privacy settings of roughly 5,000 Facebook users who were part of the university network on Facebook between 2005 and 2011. It is among the first longitudinal efforts aimed at gauging how Facebook users try to protect their information.

The study showed how over those years, Facebook made changes that  elicited increasing amounts of data. For example, the social network tripled the data fields its users could fill out. It introduced Timeline in 2011, encouraging users to fill in much more personal history, including whether they were expecting a baby or had acquired a new car. Its diverse applications offered users the opportunity to share what news articles and books they read. And it let them “tag” one another, effectively allowing one user to post information about a Facebook “friend.”

But even as Facebook encouraged more sharing, users became less likely to reveal to strangers certain pieces of sensitive, fine-grained personal information like dates of birth and what high school they attended, the survey found. There was a similar decline in users revealing their phone numbers and instant-messaging addresses to others in the university network who were not their Facebook “friends.”

Then, between late 2009 and late 2010, the data found a swift, marked turnaround, as if users had suddenly decided to become more public about what they shared. The more likely explanation, the researchers said, was that the company tweaked its privacy interface in December 2009. The changes proved confusing to many users, who made public some information they may have intended to keep private.

Eventually, Facebook’s changes to its privacy settings attracted the attention of government regulators. In 2011, the company agreed to let the Federal Trade Commission carry out annual audits of its privacy policies for 20 years.

The research paper, written by Alessandro Acquisti, Ralph Gross and Fred Stutzman, is unusual in that it followed the privacy practices of a set of users over an extended period. It did not receive any financing from Facebook or its business rivals.

Read the rest of the story at the New York Times >>

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