Jonathan Stray @jonathanstray.com · Mar 27 We ran an international competition to design new social media algorithms, then used a browser extension to intercept users' feeds and re-ranked them in real time. Each algorithm could re-order, add, and/or delete posts and comments on Facebook, X/Twitter, and Reddit. 2/
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The result: affective polarization dropped by an average of -0.03 SD (p<0.05), a 1.5 point shift on the 100-point feeling thermometer. By comparison, US polarization has risen ~0.6 points/year, so this is like reversing roughly 2.5 years of increase. 3/