The little things — pop-ups, notifications, warnings — work to fight fake news, new evidence shows

“Relatively short, scalable interventions could be effective in fighting misinformation around the world.” In 2017, Facebook released a set of “Tips to spot false news.” Developed in collaboration with First Draft, the tips were “promoted at the top of users’ news feeds in 14 countries in April 2017 and printed in full-page newspaper advertisements in...