They investigated the effect of social engagement metrics on the spread of information from low-credibility sources using Fakey, a new literacy game that stimulates a social media feed. The game presents players with actual current news articles from mainstream and low-credibility media sources. A randomly generated social engagement metric is displayed with each presented article. Then the players are instructed to share, like, fact check, or skip articles. Over 19-months after deploying the game, they analyzed game-play sessions of over 8,500 unique players, mainly from the United States, involving approximately 120,000 articles, half from sources flagged as low-credibility by news and fact-checking organizations.