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What You 'like' On Facebook Can Be Revealing

By RAPHAEL SATTER

LONDON (AP) â¿¿ Clicking those friendly blue "like" buttons strewn across the Web may be doing more than marking you as a fan of Coca-Cola or Lady Gaga.

It could out you as gay.

It might reveal how you vote.

It might even suggest that you're an unmarried introvert with a high IQ and a weakness for nicotine.

That's the conclusion of a study published Monday in Proceedings of the National Academy of Sciences. Researchers reported analyzing the likes of more than 58,000 American Facebook users to make guesses about their personalities and behavior, and even whether they drank, smoked, or did drugs.

Cambridge University researcher David Stillwell, one of the study's authors, said the results may come as a surprise.

"Your likes may be saying more about you than you realize," he said.

Facebook launched its like button in 2009, and the small thumbs-up symbol has since become ubiquitous on the social network and common across the rest of the Web as well. Facebook said last year that roughly 2.7 billion new likes pour out onto the Internet every day - endorsing everything from pop stars to soda pop. That means an ever-expanding pool of data available to marketers, managers, and just about anyone else interested in users' inner lives, especially those who aren't careful about their privacy settings.

Stillwell and his colleagues scooped up a bucketful of that data in the way that many advertisers do - through apps. Millions of Facebook users have surveyed their own personal traits using applications including a program called myPersonality. Stillwell, as owner of the app, has received revenue from it, but declined to say how much.

His study zeroed in on the 58,466 U.S. test takers who had also volunteered access to their likes.

When researchers crunched the "like" data and compared their results to answers given in the personality test, patterns emerged in nearly every direction. Since the study involved people who volunteered access to their data, it's unclear if the trends would apply to all Facebook users.

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