Three-member teams with at least one person in a good mood were more than twice as likely to solve a puzzle as teams whose members were all in neutral
moods, according to an experiment by Kyle J. Emich, of Fordham University.
That is because people in good moods are more likely to share knowledge and
seek information from others, which cues the rest of the group to follow suit.
Harvard Business Review (2014) Research Watch. Harvard Business Review. October 2014, pp.26.