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Yelp’s algorithms are being criticized after search results implied Korean and Chinese restaurants were serving diners dogs and cats. In cities across the US, Yelp suggested Korean and Chinese restaurants when “dog meat” or “cat meat” was entered into the search bar, alluding to a longstanding stereotype about East Asian restaurants in America.

The Tampa Bay Times confirmed the offensive search results “almost always” appeared when looking at restaurants in New York, Philadelphia, Denver, Atlanta, and other cities. In a statement to the newspaper, Yelp pledged to remove the offensive suggestions. In Gizmodo’s own tests Wednesday evening, the search terms brought up no results.

It’s unclear exactly how the suggestions were created, but a Yelp spokesperson emphasized that “no human programmed these results or matches,” noting that search results are automatically generated from “real-world consumer user data and human behavior patterns,” including user reviews, previous searches and in-app behavior.

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“Included in the huge volume of search queries Yelp receives are some very rare, atypical ones that computer-generated models still try to match ... which is made more difficult by the rarity of this search occurrence,” the Yelp spokesperson said. “Thank you for bringing this to our attention and allowing us to correct it.”

It seems probable that enough users included references to dog and cat meat in their reviews or tags of Asian restaurants that Yelp surfaced results for Asian restaurants in general when the terms were submitted. While the fact that a computer program was effectively to blame may comfort some, the incident highlights how the algorithms we increasingly rely on can internalize and reproduce human biases—often invisibly.

Last year, Facebook faced similar accusations of algorithmic bias when derogatory phrases like “jew-hunters” were uncovered in Facebook’s internal ad portal as a valid entry for the “Occupation” category. Facebook removed the phrases and said algorithms surfaced what users themselves submitted in their profiles. If Yelp similarly has a list of “banned” search associations, it’s past time to update them.

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[Tampa Bay Times]