Craig Timberg and Elizabeth Dwoskin report for Washington Post:


Social media analyst Jonathan Albright got a call from Facebook the day after he published research last week showing that the reach of the Russian disinformation campaign was almost certainly larger than the company had disclosed. While the company had said 10 million people read Russian-bought ads, Albright had data suggesting that the audience was at least double that — and maybe much more — if ordinary free Facebook posts were measured as well.
Albright welcomed the chat with three company officials. But he was not pleased to discover that they had done more than talk about their concerns regarding his research. They also had scrubbed from the Internet nearly everything — thousands of Facebook posts and the related data — that had made the work possible.
Never again would he or any other researcher be able to run the kind of analysis he had done just days earlier.
Facebook does not dispute it removed the posts, but it offers a different explanation of what happened. The company says it has merely corrected a “bug” that allowed Albright, who is research director of the Tow Center for Digital Journalism at Columbia University, to access information he never should have been able to find in the first place. That bug, Facebook says, has now been squashed on a social media analytics tool called CrowdTangle, which Facebook bought last year.
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