Facebook finds no evidence of Trending Topics bias, but makes changes anyway

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(CNNMoney) — Facebook has found “no evidence of systematic political bias” in how news stories are chosen for its Trending Topics features, according to results of an internal investigation released Monday.

However, it will make some changes to how the tool works, including no longer using outside sites to determine if a trending story is relevant.

The announcement was part of a response to an inquiry from the Senate Commerce Committee, which had asked Facebook about accusations of political bias in its Trending Topics feature.

“Our analysis indicated that the rates of approval of conservative and liberal topics are virtually identical in Trending Topics. Moreover, we were unable to substantiate any of the specific allegations of politically-motivated suppression of subjects or sources, as reported in the media. To the contrary, we confirmed that most of those subjects were in fact included as trending topics on multiple occasions,” said Facebook’s general counsel Colin Stretch in the letter.

Facebook did acknowledge it’s possible an individual contractor could had been biased.

“Despite the findings of our investigation, it is impossible to fully exclude the possibility that, over the years of the feature’s existence, a specific reviewer took isolated actions with an improper motive,” said Stretch.

Earlier this month, Senator John Thune, chairman of the Commerce Committee, had asked Facebook if employees manipulated what showed up in the section. He requested details on how the topics are chosen, and an update on Facebook’s investigation into the accusations.

Stretch met personally with Thune last week to discuss the matter. Thune thanked the company for its transparency, and said the process relied more on human judgment than previously thought.

“Facebook has recognized the limitations of efforts to keep information systems fully free from potential bias, which lends credibility to its findings,” said Thune in a statement. “While the committee remains open to new information on this matter, transparency — not regulation — remains the goal, so I thank the company for its efforts to acknowledge relevant facts and its recognition of a continuing need to transparently address relevant user questions.”

The social network will make a number of changes to how Trending Topics are chosen. It will not rely on lists of external sites determine which topics are important, including its top 10 list of media outlets. It will no longer determine the “importance level” of a subject based on how many of those top media outlets are covering it.

It is also clarifying its internal guidelines, giving reviewers additional anti-bias training, and adding new oversight for the review team.


Facebook is making changes to their Trending Topics, including:

  • Updated terminology in our Guidelines to make them more clear
  • Refresher training for all reviewers that emphasized that content decisions may not be made on the basis of politics or ideology
  • Additional controls and oversight around the review team, including robust escalation procedures

In addition to these operational efforts, Facebook is also making the following improvements to the product and tools:

  • Facebook will no longer rely on lists of external websites and news outlets to identify, validate or assess the importance of particular topics. This means they will eliminate the “Media 1K” list, the list of RSS feeds used to supplement the algorithm that generates potential trending topics, and the top-10 list of news outlets.
  • Facebook is also removing the ability to assign an “importance level” to a topic through assessment of the topic’s prominence on the top-10 list of news outlets.
  • Facebook will expand their Help Center content on Trending Topics to provide more information about the feature and how it works.

This is the latest attempt by Facebook to quell dispel claims that its Trending Topics box is biased against conservative sources. Last week, the company invited 16 conservative commentators and leaders to its Menlo Park headquarters to meet with Zuckerberg.

The controversy began when anonymous former Facebook contractors told tech blog Gizmodo they routinely suppressed news with a conservative bent.

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