There is no difference in contagious yawning between men and women

by Andrew C. Gallup, Jorg J. M. Massen
Published 2016-01-01

An observational investigation of behavioural contagion in common marmosets (Callithrix jacchus): indications for contagious scent-marking.

by Jorg J.M. Massen, Vedrana Šlipogor, Andrew C Gallup
Published 2016-08-01

Auditory Contagious Yawning in Humans: An Investigation into Affiliation and Status Effects

by Jorg J.M. Massen, Allyson M. Church, Andrew C Gallup
Published 2015-11-01

Carrion Crows and Azure-Winged Magpies Show No Prosocial Tendencies When Tested in a Token Transfer Paradigm

by Lisa Horn, Jeroen S. Zewald, Thomas Bugnyar, Jorg J. M. Massen
Published 2021-05-01

Partner Choice in Raven (Corvus corax) Cooperation.

by Kenji Asakawa-Haas, Martina Schiestl, Thomas Bugnyar, Jorg J M Massen
Published 2016-01-01

Male yawning is more contagious than female yawning among chimpanzees (Pan troglodytes).

by Jorg J M Massen, Dorith A Vermunt, Elisabeth H M Sterck
Published 2012-01-01

Exploring the Cognitive Capacities of Japanese Macaques in a Cooperation Game

by Ryan Sigmundson, Mathieu S. Stribos, Roy Hammer, Julia Herzele, Lena S. Pflüger, Jorg J. M. Massen
Published 2021-05-01

Cooperation with closely bonded individuals reduces cortisol levels in long-tailed macaques

by Martina Stocker, Matthias-Claudio Loretto, Elisabeth H. M. Sterck, Thomas Bugnyar, Jorg J. M. Massen
Published 2020-05-01

Generous leaders and selfish underdogs: pro-sociality in despotic macaques.

by Jorg J M Massen, Lisette M van den Berg, Berry M Spruijt, Elisabeth H M Sterck
Published 2010-03-01

Experimental evidence for yawn contagion in orangutans (Pongo pygmaeus)

by Evy van Berlo, Alejandra P. Díaz-Loyo, Oscar E. Juárez-Mora, Mariska E. Kret, Jorg J. M. Massen
Published 2020-12-01

Subadult ravens generally don’t transfer valuable tokens to conspecifics when there is nothing to gain for themselves.

by Jorg J.M. Massen, Megan eLambert, Martina eSchiestl, Martina eSchiestl, Thomas eBugnyar, Thomas eBugnyar
Published 2015-06-01

Brain size and neuron numbers drive differences in yawn duration across mammals and birds

by Jorg J. M. Massen, Margarita Hartlieb, Jordan S. Martin, Elisabeth B. Leitgeb, Jasmin Hockl, Martin Kocourek, Seweryn Olkowicz, Yicheng Zhang, Christin Osadnik, Jorrit W. Verkleij, Thomas Bugnyar, Pavel Němec, Andrew C. Gallup
Published 2021-05-01