Network Contagion Research Institute Intelligence Report 4 of publication, TikTok disabled its hashtag measurement functionality in a move that renders our December research findings irreplicable. Given these platform changes undertaken in recent months, the methodological basis of this current study are user journeys. The user journey methodology recreates the on-platform experience of a newly created, organic user. As is discussed at length the following section, the accounts created for this study on TikTok, Instagram, and YouTube mimicked 16-year-old users located in the United States. These accounts were used to test the three platforms’ search algorithm results when inputting keywords of hot-button issues for the CCP domestically. An advantage of user journeys over web scraping or paginated mass collection techniques is that manual operation of dedicated sock puppet accounts more closely reproduces the search results and content flow that an organic user is likely to encounter. In recent years, user journeys are becoming an increasingly widespread technique for internet and social media algorithmic researchers. AI Forensics, a European non-profit research institute, partnered with Amnesty International in 2023 to conduct a user journey-driven analysis to study how the TikTok algorithm negatively influences teen mental health. 3 AI forensics’ primary research design relied on automatic collection of post data via 40 sock puppets, paired with a manual audit that strove to heuristically confirm findings. The Amnesty International report concluded that through TikTok’s algorithm, “children and young people are being exposed to a system which turns their psychological vulnerabilities into a means to maximize “user engagement.”4 Following the October 7th attack by Hamas and the eruption of conflict across the Middle East, researchers with the Wall Street Journal (WSJ) embraced user journeys as a way to gauge algorithmic bias vis-a-vis the war in Gaza. The WSJ team created 8 sock puppet accounts posing as 13-year-old American teens and categorized conflict-related content that was served up as either pro-Palestinian or pro-Israel. The WSJ found that: “Similarly to other social-media platforms, much of the war content TikTok served the accounts was pro-Palestinian—accounting for 59% of the more than 4,800 videos served to the bots that the Journal reviewed and deemed relevant to the conflict or war. Some 15% of those shown were pro-Israel.”5 This finding that four times as much pro-Palestinian conflict-centric content was served relative to pro-Israel content likewise coincides with the CCP’s geopolitical interests in the Middle East, which have notably chilled towards Israel while warming towards the Palestinians and other 3 AIForensics. (2023). Unmasking TikTok's influence on youth mental health: A comprehensive investigation. https://aiforensics.org/work/tiktok-kids 4 Amnesty International. (2021). Driven into the darkness: How TikTok's 'For You' feed encourages self-harm and suicidal ideation (p. 64). https://aiforensics.org/uploads/POL_4073502023_ENGLISH_6ace7064be.pdf 5 Schechner, S., Barry, R., Wells, G., French, J., Whitton, B., & Dapena, K. (2023, Dec 22). How TikTok brings war home to your child. The Wall Street Journal. https://www.wsj.com/tech/tiktok-israel-gaza-hamas-war-a5dfa0ee

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