There were, however, two behaviors that all the good teams shared. First, all the members of the good teams spoke in roughly the same proportion, a phenomenon the researchers referred to as "equality in distribution of conversational turn-taking." In some teams, for instance, everyone spoke during each task. In other groups, conversation ebbed from assignment to assignment--but by the end of the day, everyone had spoken roughly the same amount. "As long as everyone got a chance to talk, the team did well," said Woolley. "But if only one person or a small group spoke all the time, the collective intelligence declined. The conversations didn't need to be equal every minute, but in aggregate, they had to balance out."