Does the platform matter? Social media and COVID-19 conspiracy theory beliefs in 17 countries, 2021 .. "we show that Twitter has a negative effect on conspiracy beliefs—as opposed to all other platforms under examination which are found to have a positive effect." User cust0s, in the Network XXIII subreddit, 20 Oct 2021
Cross-national dataset from 17 countries before and after the onset of the COVID-19 pandemic shows that Twitter had a negative effect on conspiracy beliefs while all other platforms examined encouraged them. User StopBadModerators, in the Reddit Science subreddit, 10 Oct 2021