Title: Social laughter is correlated with an elevated pain threshold
Who conducted it: R. I. M. Dunbar, Rebecca Baron, Anna Frangou, Eiluned Pearce, Edwin J. C. van Leeuwen, Julie Stow, Giselle Partridge, Ian MacDonald, Vincent Barra and Mark van Vugt
Published when and where: The study was published in 2011 in The Proceedings of the Royal Society B.