This one is a breakup video with the hashtag #sad. After kentucky_96’s first sad video, TikTok serves another one 23 videos later – or after about four more minutes of watching. The author of the video, the audio track, the video description, the hashtags. The information contained in this single video provided the app with important clues. Here TikTok gets its first inkling that perhaps the new user is feeling down lately. Kentucky_96 watches the 35-second video twice. Less than three minutes into using TikTok, at its 15th video, kentucky_96 pauses on this. One bot was programmed with sadness and depression as “interests.” Some it figured out in less than 40 minutes. In fact, TikTok fully learned many of our accounts’ interests in less than two hours. “The algorithm on TikTok can get much more powerful and it can be able to learn your vulnerabilities much faster.” He says TikTok is different from other social media platforms. He’s now an advocate for algorithm transparency. The results were analysed by data scientist and algorithm expert Guillaume Chaslot, a former Google engineer who worked on YouTube’s algorithm. What the paper found was that the video selections and view counts contracted, from popular videos about anything, to ones tightly focused on the interests it had identified. It would then stop scrolling to watch these videos, and rewatch some of them. The bot checked each video in its feed for hashtags or AI-identified images relating to its interests. Those interests weren’t ever entered into the app, just used as the basis for choosing the videos that the bot watched. The WSJ programmed bots to have an age, location, and a set of particular interests. TikTok starts by serving the account a selection of very popular videos vetted by app moderators.įrom these, it works to identify your interests. Open the app and you’ll immediately see an endless string of videos in your For You feed. The TikTok experience starts the same way for everyone. Through this one powerful signal, TikTok learns your most hidden interests and emotions, and drives you deep into rabbit holes of content that are hard to escape. We found out that TikTok only needs one of these to figure you out: How long you linger over a piece of content.Įvery second you hesitate or rewatch, the app is tracking you. The WSJ created a 13-minute video to share its findings. But the analysis suggested that one of the four is by far the most important … Officially, TikTok says that it uses four signals: what you watch, share, like, and follow. But the WSJ thinks it was able to work it out using a bunch of bot accounts – and the results were both fascinating and disturbing.Ī former Google engineer who worked on YouTube’s algorithm says that it takes essentially the same approach, but in a less extreme form. How TikTok’s algorithm works is probably the company’s most closely guarded secret. So far, it appears only very generic reasons are being offered – like “This video is popular in the United States” – but the company is promising greater granularity later … For any video, you can tap the Share panel then the question-mark icon called “Why this video?”. Update: TikTok says it is today launching a new tool to provide greater transparency on how videos are added to a user’s feed.
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