Are you more likely to use words like “happy” and “family” in your social media posts? Or do you use emotional and cognitive words like “angry” and “thinking?” The words you use may be a clue to your religious affiliation. A study of 12,815 U.S. and U.K. Facebook users finds use of positive emotion and social words is associated with religious affiliation whereas use of negative emotion and cognitive processes is more common for those who are not religious than those who are religious.