“Rather, the groups with the greatest synchrony had one or two people who behaved very differently from Participant 4. These people tended to speak less than dominant leaders, and when they did open their mouths, it was usually to ask questions. They repeated others’ ideas and were quick to admit their own confusion or make fun of themselves. They encouraged their groupmates (“That’s really smart! Tell me more about what you think!”) and laughed at others’ jokes. They didn’t stand out as particularly talkative or clever, but when they spoke, everyone listened closely. And, somehow, they made it easier for other people to speak up. They made conversations flow. Sievers began referring to these people as high centrality participants.”