Microblogging platform Twitter uses an algorithm that amplifies the reach of politically right-leaning sources more than that of politically left-leaning sources, suggested a study. Twitter uses the algorithm to personalize the content its users see on their home timelines.

Cambridge University professor Ferenc Huszar and his colleagues quantified whether Twitter's algorithm amplifies left-leaning or right-leaning content using a randomized control group of nearly two million daily active Twitter users chosen by the platform to receive content in reverse-chronological order without personalization and a treatment group representing 4 per cent of all other accounts with personalized timelines.