"In other words, Facebook’s news section operates like a traditional newsroom, reflecting the biases of its workers and the institutional imperatives of the corporation," Gizmodo reported.
A Facebook spokesperson later denied the allegations.
"We take allegations of bias very seriously. Facebook is a platform for people and perspectives from across the political spectrum," the spokesperson told Buzzfeed. "Trending Topics shows you the popular topics and hashtags that are being talked about on Facebook. There are rigorous guidelines in place for the review team to ensure consistency and neutrality. These guidelines do not permit the suppression of political perspectives. Nor do they permit the prioritization of one viewpoint over another or one news outlet over another. These guidelines do not prohibit any news outlet from appearing in Trending Topics."
The Trending Topics section on Facebook is different for everyone; the stories that appear are generated by where the user lives, what the user routinely searches and other factors. Facebook uses an algorithm to surface popular topics at any given time, and a team of curators then tailors the list to meet particular standards.
Gizmodo did not name any of the former Facebook employees that served as sources for its story. And it acknowledged that it's unclear whether the biased filtering is still happening.
Read more on Gizmodo.