Dr. J.J.M. (Jorg) Massen

Dr. J.J.M. (Jorg) Massen

Universitair docent
Animal Behaviour and Cognition
030 253 5403


67. Kluiver, C.E., de Jong, J.A., Massen, J.J.M., & Bhattacharjee, D., (2022). Personality as a predictor of time-activity budget in lion-tailed macaques (Macaca silenus). Animals, 12, 1495. doi: 10.3390/ani12121495

66. Gallup, A.C., Schild, A.B., Ühlein, M.A. Bugnyar, T. & Massen, J.J.M. (2022). No evidence for contagious yawning in ravens (Corvus corax): an observational study. Animals, 12, 1357. doi: 10.3390/ani12111357 

65. Šlipogor, V., Graf, C., Massen, J.J.M., & Bugnyar, T. (2022). Personality and social environment predict cognitive performance in common marmosets (Callithrix jacchus). Scientific Reports, 12, 6702. doi: 10.1038/s41598-022-10296-8

64. Massen, J.J.M., & Gallup, A.C. (2022). The evidence does not support long-term oxygenation as a functional explanation for the evolution of yawning. Sleep and Breathing. doi: 10.1007/s11325-022-02627-w

63. Kret, M.E., Massen, J.J.M. & de Waal, F.B.M. (2022). My fear is not, and never will be, your fear: On emotions and feelings in animals. Affective science, 3, 182–189. doi: 10.1007/s42761-021-00099-x 

62. Boucherie, P., Gallego-Abenza, M., Massen, J.J.M. & Bugnyar, T. (2022). Dominance in a socially dynamic setting: how do ravens cope with changing group compositions and dependent ranks? Philosophical Transactions of the Royal Society B. 377, 20200446. doi: 10.1098/rstb.2020.0446 

61. Miller, R., Lambert, M.L., Frohnwieser, A., Brecht, K.F., Bugnyar, T., Crampton, I., Garcia-Pelegrin, E., Gould, K., Greggor, A., Izawa, E.-I., Kelly, D.M., Li, L., Lou, Y., Luong, L., Massen, J.J.M., Neider, A., Reber, S., Schiestl, M., Seguchi, A., Sepehri, P., Stevens, J.R., Taylor, A.H., Wang, L., Wolff, L.M., Zhang, Y., & Clayton, N.S. (2022). Individual consistency, species differences and the influence of socio-ecological factors on neophobia in 10 corvid species. Current Biology, 32, 74-85. doi: 10.1016/j.cub.2021.10.045



60. Gallup, A.C., Kret, M.E., Eldakar, O.T., Folz, J., & Massen, J.J.M. (2021). People that score high on psychopathic traits are less likely to yawn contagiously. Scientific Reports, 11, 23779. doi: 10.1038/s41598-021-03159-1 

59. Laumer, I.B.*, Massen, J.J.M.*, Boehm, P.M., Boehm, A., Geisler, A. & Auersperg, A.M.I. (2021). Individual Goffin’s cockatoos (Cacatua goffiniana) show flexible targeted helping in a tool transfer task. PLoS One, 16, e0253416. doi: 10.1371/journal.pone.0253416   * co-first authors.

58. Stocker, M, Prösl, J., Vanhooland, L-C., Horn, L., Bugnyar, T., Canoine, V.# & Massen, J.J.M.# (2021). Measuring salivary mesotocin in birds - Seasonal differences in ravens’ peripheral mesotocin levels. # both authors contributed equally. Hormones & Behaviour, 134, 105015. doi: 10.1016/j.yhbeh.2021.105015  

57. Sigmundson, R., Stribos, M., Hammer, R., Herzele, J., Pflüger, L.S., & Massen, J.J.M. (2021). Exploring the cognitive capacities of Japanese macaques in a cooperation game. Animals, 11, 1497. doi: 10.3390/ ani11061497

56. Horn, L., Zewald, J.S., Bugnyar, T., & Massen, J.J.M. (2021). Carrion crows and azure-winged magpies show no prosocial tendencies when tested in a token exchange paradigm. Animals, 11, 1526. doi: 10.3390/ani11061526

55. Massen, J.J.M.*, Hartlieb, M.*, Martin, J.S.*, Leitgeb, E.B., Hockl, J., Kocourek, M., Olkowicz, S., Osadnik, C., Verkleij, J.W., Zhang, Y., Bugnyar, T., Nemec, P. & Gallup, A.C.  (2021). Brain size and neuron numbers drive differences in yawn duration across mammals and birds. Communications Biology, 4, 503. doi: 10.1038/s42003-021-02019-y *co-first authors.

54. Wijnen, M.N., Massen, J.J.M., & Kret, M.E. (in press). Gender bias in the allocation of student grants. Scientometrics

53. Šlipogor, V., Massen, J.J.M., Schiel, N., Souto, A., & Bugnyar, T. (2021). Temporal consistency and ecological validity of personality structure in common marmosets (Callithrix jacchus): a unifying field and laboratory approach. American Journal of Primatology, e23229. doi: 10.1002/ajp.23229

52. Martin, J.S., Koski, S.E., Bugnyar, T., Jaeggie, A.V. & Massen, J.J.M. (2021). Prosociality, social tolerance, and partner choice facilitate mutually beneficial cooperation in common marmosets. Animal Behaviour, 173, 115-136. doi: 10.1016/j.anbehav.2020.12.016



50. Van Berlo, E., Díaz-Loyo, A.P., Juárez-Mora, O.E., Kret, M.E. & Massen, J.J.M. (2020). Experimental evidence for contagious yawning in Bornean orangutans (Pongo pygmeus). Scientific Reports, 10, 22251. doi: 10.1038/s41598-020-79160-x

49. Horn, L., Bugnyar T., Griesser, M., Hengl, M., Izawa, E.I., Oortwijn, T., Rössler, C., Scheer, C., Schiestl, M., Suyama, M., Taylor, A.H., Vanhooland, L.-C., von Bayern, A.M.P., Zürcher, Y. & Massen, J.J.M. (2020). Sex-specific effects of cooperative breeding and colonial nesting on prosociality in corvids. eLife, 9, e58139. doi: 10.7554/eLife.58139

48. Massen, J.J.M.*, Haley, S.M.* & Bugnyar, T. (2020). Azure-winged magpies’ decisions to share food are contingent on the presence or absence of food for the recipient. Scientific Reports, 10, 16147. doi: 10.1038/s41598-020-73256-0. *co-first authors

47.  Massen, J.J.M., Bauer, L., Spurny, B., Bugnyar, T. & Kret. M. E. (2020). Reply to: “The data do not support the existence of an ‘Old Boy network’ in science. Some critical comments on a study by Massen et al.” Scientific Reports, 10, 13783. doi: 10.1038/s41598-020-69108-6

46. Stocker, M, Loretto, M.C., Sterck, E.H.M., Bugnyar, T. & Massen, J.J.M. (2020). Cooperation with closely bonded individuals reduces cortisol levels in long-tailed macaques. Royal Society Open Science, 7, 191056. doi:10.1098/rsos.191056

45. Gallup, A.G. & Massen, J.J.M. (2020). Intranasal oxytocin, empathy, and contagious yawning in dogs and humans. Applied Animal Behaviour Science, 224, 104971. doi:  10.1016/j.applanim.2020.104971

44. Massen, J.J.M. (2020). Editorial: Studying the evolution of cooperation and prosociality in birds (editorial). Ethology, 126, 121-124. doi: 10.1111/eth.13001.

43. Morales Picard, A., Mundry, R., Auersperg, A.M., Boeving, E.R., Boucherie, P.M., Bugnyar, T, Dufour, V., Emery, N.J., Federspiel, I., Gajdon, G., Guéry, J.-P., Hegedic, M., Horn, L., Kavanagh, E., Lambert, M.L., Massen, J.J.M., Rodrigues, M., Schiestl, M., Schwing, R., Szabo, B., Taylor, A.H., van Horik, J.O., von Bayern, A.M.P., Seed, A, & Slocombe, K.E. (2020). Why preen others? Predictors of allopreening in parrots and corvids and comparisons to grooming in great apes. Ethology, 126, 207-228. doi: 10.1111/eth.12999.

42. Gallup, A. C., Moscatello, L. & Massen, J.J.M. (2020). Yawn duration predicts brain weight across domesticated dog breeds. Current Zoology.

41. Sierro, J., Loretto, M.C., Szipl, G., Massen, J.J.M. & Bugnyar, T. (2020). Food calling in ravens (Corvus corax) revisited: who is addressed? Ethology, 126, 257-266. doi: 10.1111/eth.12991.

40. Vanhooland, L.-C., Bugnyar, T. & Massen, J.J.M. (2020). Crows (Corvus corone sp.) check the contingency of their behaviour in a mirror, yet fail to pass the Mirror-Mark Test. Journal of Comparative Psychology, 134, 158-169. doi: 10.1037/com0000195.

39. Laumer, I.B*, Massen, J.J.M.*, Lorck-Tympner, M., Wakonig, B., Carminito, C. & Auersperg, A.M.I. (2020). Tentative evidence for inequity aversion to unequal work-effort but not to unequal reward distribution in Goffin’e cockatoos. Ethology, 126, 185-194. doi: 10.1111/eth.12947. * co-first authors.



38. Massen, J.J.M., Behrens, F., Martin, J.S., Stocker, M. & Brosnan, S.F. (2019). A comparative approach to affect and cooperative decision-making. Neuroscience & Biobehavioural Reviews, 107, 370-387. 

37. Bouchery, P., Loretto, M.C., Massen, J.J.M., & Bugnyar, T.,  (2019). What constitutes ‘social complexity’ and ‘social intelligence’ in birds? Lessons from ravens. Behavioral Ecology and Sociobiology, 73, 12. doi: 10.1007/s00265-018-2607-2

36. Martin, J.S., Massen, J.J.M., Šlipogor, V., Bugnyar, T., Jaeggie, A.V. & Koski, S.E. (2019). The EGA+GNM Framework: An Integrative Approach to Modeling Behavioral Syndromes. Methods in Ecology and Evolution. doi: 10.1111/2041-210X.13100



35. Horn, L., Hungerländer, N.A., Windhager, S., Bugnyar, T. & Massen, J.J.M. (2018). Social status and prenatal testosterone exposure affect 6–9-year-old children’s prosocial choices. Scientific Reports, 8, 9198. doi: 10.1038/s41598-018-27468-0



34. Massen, J.J.M., Bauer, L., Spurny, B., Bugnyar, T. & Kret. M. E. (2017). Sharing of science is most likely among male scientists. Scientific Reports, 7, 12927. doi: 10.1038/s41598-017-13491-0

33. Massen, J.J.M. & Gallup, A.C. (2017). Why contagious yawning does not (yet) equate to empathy. Neuroscience & Biobehavioral Reviews, 80, 573-585. doi: 10.1016/j.neubiorev.2017.07.006.

32. Müller, J.J.A.*, Massen, J.J.M.*, Bugnyar, T. & Osvath, M. (2017). Ravens remember the nature of a single reciprocal interaction sequence over two days and even after a month. Animal Behaviour, 128, 69-78. doi:10.1016/j.anbehav.2017.04.004.

*Co-first authors

31. Munteanu, A.M., Stocker, M., Stöwe, M., Massen, J.J.M. & Bugnyar, T. (2017). Behavioural and hormonal stress responses to social separation in ravens, Corvus corax. Ethology, 123, 123-135. doi: 10.1111/eth.12580

30. Lambert, M.L., Massen, J.J.M., Seed, A.M., Bugnyar, T. & Slocombe, K.E. (2017). An ‘unkindness’ of ravens? Measuring prosocial preferences in Corvus corax. Animal Behaviour, 123, 383-393. doi: 10.1016/j.anbehav.2016.11.018



29. Horn, L., Scheer, C., Bugnyar, T. & Massen, J.J.M. (2016). Proactive prosociality in a cooperative breeding corvid, the Azure winged magpie (Cyanopica cyanus). Biology Letters, 12, 20160649. doi: 10.1098/rsbl.2016.0649

28. Schwing, R., Jocteur, E., Wein, A., Noë, R. & Massen, J.J.M. (2016). Kea cooperate better with sharing affiliates. Animal Cognition, 19, 1093–1102. doi: 10.1007/s10071-016-1017-y

27.  Gallup, A.C. & Massen, J.J.M.# (2016). There is no difference in contagious yawning between men and women. Royal Society Open Science, 3, 160174. doi: 10.1098/rsos.160174. # both authors contributed equally

26. Massen, J.J.M., Šlipogor, V. & Gallup, A.C. (2016). An investigation of behavioural contagion in common marmosets (Callithrix jacchus): an observational study. Frontiers in Comparative Psychology. 7, 1190. doi: 10.3389/fpsyg.2016.01190

25. Šlipogor, V., Gunhold-de Oliveira, T., Tadic, Z., Massen, J.J.M. & Bugnyar, T. (2016). Consistent inter-individual differences in marmosets (Callitrix jachus) in Boldness-Shyness, Stress-Activity and Exploration-Avoidance. American Journal of Primatology. 78, 961–973. doi: 10.1002/ajp.22566

24. Asakawa-Haas, K., Schiestl, M., Bugnyar, T. & Massen, J.J.M. (2016). Partner choice in raven (Corvus corax) cooperation. PLoS ONE, 11, e0156962. doi: 10.1371/journal.pone.0156962



23. Kalcher-Sommersguter, E., Preuschoft, S., Franz-Schaider, C., Hemelrijk, C.K., Crailsheim, K. & Massen, J.J.M. (2015). Early maternal loss affects social integration of chimpanzees throughout their lifetime. Scientific Reports, 5, 16439. doi: 10.1038/srep16439

22. Massen, J.J.M., Church, A. & Gallup, A.C. (2015). Auditory contagious yawning in humans: an investigation into affiliation and status effects. Frontiers in Psychology, 6, 1735. doi: 10.3389/fpsyg.2015.01735

21. Massen, J.J.M., Ritter, C. & Bugnyar, T. (2015). Tolerance and reward equity predict cooperation in ravens (Corvus corax). Scientific Reports, 5, 15021. doi: 10.1038/srep15021

20. Sonnweber, R.S., Massen, J.J.M. & Fitch, W.T. (2015). Post-copulatory grooming: a conditional mating strategy? Behavioural Ecology and Sociobiology, 69, 1749–1759. doi: 10.1007/s00265-015-1987-9

19. Massen, J.J.M., Lambert, M., Schiestl, M. & Bugnyar, T. (2015). Subadult ravens generally don't transfer valuable tokens to conspecifics when there is nothing to gain for themselves. Frontiers in Comparative Psychology, 6, 885. doi: 10.3389/fpsyg.2015.00885

18. Sterck, E.H.M., Olesen, C.U. & Massen, J.J.M. (2015). No costly pro-sociality among related long-tailed macaques, Macaca fascicularis. Journal of Comparative Psychology, 129, 275-282. doi: 10.1037/a0039180



17.  Massen, J.J.M., Szipl, G., Spreafico, M. & Bugnyar, T. (2014). Ravens intervene in others’ bonding attempts. Current Biology, 24, 2733-2736. doi: 10.1016/j.cub.2014.09.073

16.  Massen, J.J.M., Dusch, K., Eldakar, O.T. & Gallup, A.C. (2014). A thermal window for yawning in humans: Yawning as a Brain Cooling Mechanism. Physiology & Behavior, 130: 145-148. doi: 10.1016/j.physbeh.2014.03.032

15.  Massen, J.J.M., Pašukonis, A., Schmidt, J. & Bugnyar, T. (2014). Ravens notice dominance reversals among conspecifics within and outside their social group. Nature Communications, 5: 3679. doi: 10.1038/ncomms4679

14.  Gunhold, T., Massen, J.J.M., Schiel, N., Souto, A. & Bugnyar, T. (2014). Memory, transmission and persistence of alternative foraging techniques in wild common marmosets. Animal Behaviour, 91: 79-91. doi: 10.1016/j.anbehav.2014.02.023

13.  Massen, J.J.M. & Koski, S.E. (2014). Chimps of a feather sit together. Chimpanzee friendships are based on homophily in personality. Evolution and Human Behavior, 35: 1-8. doi: 10.1016/j.evolhumbehav.2013.08.008



12. Massen, J.J.M. & Sterck, E.H.M. (2013). Stability and durability of within- and between-sex social bonds of captive rhesus macaques (Macaca mulatta). International Journal of Primatology, 34: 770-791. doi: 10.1007/s10764-013-9695-7

11. Massen, J.J.M., Antonides, A., Arnold, A. K., Bionda, T. & Koski, S.E. (2013). A behavioral view on chimpanzee personality: exploration tendency, persistence, boldness and tool-orientation measured with group experiments. American Journal of Primatology, 75: 947-958. doi: 10.1002/ajp.22159



10. Massen, J.J.M., Vermunt, D.A. & Sterck, E.H.M. (2012). Male yawning is more contagious than female yawning among chimpanzees (Pan troglodytes). PLoS ONE, 7(7): e40697. doi:10.1371/journal.pone.0040697

09. Overduin-de Vries, A.M., Massen, J.J.M., Spruijt, B.M. & Sterck, E.H.M. (2012). Sneaky monkeys: an audience effect on rhesus macaque (Macaca mulatta) sexual behaviour. American Journal of Primatology, 74: 217–228. doi: 10.1002/ajp.21988

08. Massen, J.J.M., van den Berg, L.M., Spruijt, B.M. & Sterck, E.H.M. (2012). Inequity aversion and the effect of relationship quality in long-tailed macaques (Macaca fascicularis). American Journal of Primatology, 74: 145-156. doi: 10.1002/ajp.21014

07. Massen, J.J.M., Overduin-de Vries, A.M., de Vos-Rouweler, A.J.M., Spruijt, B.M., Doxiadis, G.G.M. & Sterck, E.H.M. (2012). Male mating tactics in captive rhesus macaques, Macaca mulatta: the influence of dominance, markets and relationship quality. International Journal of Primatology. 33: 73-92. doi: 10.1007/s10764-011-9552-5



06. Massen, J.J.M., Luyten, I.J.A.F., Spruijt, B.M. & Sterck, E.H.M. (2011). Benefiting friends or dominants: Pro-social choices mainly depend on rank position in long-tailed macaques (Macaca fascicularis). Primates, 52: 237-247. doi: 10.1007/s10329-011-0244-8



05. Massen, J.J.M., van den Berg, L.M., Spruijt, B.M. & Sterck, E.H.M. (2010). Generous leaders and selfish underdogs: Pro-sociality in despotic macaques. PLoS ONE 5(3): e9734. doi: 10.1371/journal.pone.0009734

04.  Massen, J.J.M., Sterck, E.H.M. & de Vos, H. (2010). A review of close social associations in animals and humans: Functions and mechanisms of friendship. Behaviour, 147: 1379-1412. doi: 10.1163/000579510X528224


Book chapters:

03. Massen, J.J.M., Schaake, W.A.A. & Bugnyar, T. (in pres). A comparison of cooperative cognition in corvids, chimpanzees, and other animals. In: (L. Hopper & S. Ross eds.) Chimpanzees in context. Chicago, USA: University of Chicago Press.

02. Massen, J.J.M. (2017). Friendship in animals. In: (J. Vonk & T.K. Shackelford eds.) Encyclopedia of Animal Cognition and Behavior. New York, USA: Springer Nature.

01. Bugnyar, T. & Massen, J.J.M. (2017) Avian social relations, social cognition & cooperation. In: Healy, S & ten Cate, C.J. (Eds.), Avian Cognition (pp. 314-336). Cambridge, UK: Cambridge University Press.