Google hasn't released consumers from its filter bubble — the package of personalized search results it delivers — despite having promised to do so, according to study results from DuckDuckGo. Most participants saw results unique to them, the researchers found, which could not be explained by changes in location, time, by being logged into Google, or by Google testing algorithm changes with a small subset of users. On the first page of search results, Google included links for some participants that it did not include for others.