Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Chimpanzees of a feather sit together: Friendships are based on homophily in personality

10.10.2013
Like humans, many animals have close and stable friendships. However, until now, it has been unclear what makes particular individuals bond.

Cognitive Biologists of the University of Vienna, Austria, and the University of Zurich, Switzerland, explored that chimpanzees choose their friends as to be similar in personality. The results of this study appear in the scientific journal "Evolution and Human Behaviour".


Chimpanzee Tushi
(Copyright: Jorg Massen)

Jorg Massen (University of Vienna) and Sonja Koski (University of Zurich) together measured chimpanzee personality in two zoos with behavioural experiments and years of observations of chimpanzee behaviour. They also carefully logged which chimpanzee sat in body contact with whom most. "This is a clear sign of friendship among chimpanzees", explains Jorg Massen. Subsequently, the researchers tested, if those chimpanzees who sit together frequently have similar or different personality types.

"We found that, especially among unrelated friends, the most sociable and bold individuals preferred the company of other highly sociable and bold individuals, whereas shy and less sociable ones spent time with other similarly aloof and shy chimpanzees", says the researcher. The researchers argue that such a strong preference for self-like individuals is probably adaptive, because frequent cooperation becomes more reliable when both partners have similar behavioural tendencies and emotional states.

This finding strongly resembles the known "similarity effect" in humans: We tend to make friends with people who are equally extraverted, friendly and bold as ourselves. "It appears that what draws and keeps both chimpanzee and human friends together is similarity in gregariousness and boldness, suggesting that preference for self-like friends dates back to our last common ancestor", ends Jorg Massen.

Publication in "Evolution and Human Behaviour"
Massen, J.JM., & Koski, S.E.: Chimps of a feather sit together: chimpanzee friendships are based on homophily in personality, in: Evolution and Human Behavior (2013), published online Oktober 2, 2013,

http://dx.doi.org/10.1016/j.evolhumbehav.2013.08.008

Scientific contact
Jorg J.M. Massen, PhD
Department of Cognitive Biology
University of Vienna
1090 Vienna, Althanstraße 14
T +43-699-1131 0182
jorg.massen@univie.ac.at
Further inquiries
Mag. Alexandra Frey
Press office, University of Vienna
Research and Teaching
Universitätsring 1, 1010 Vienna
T +43-1-4277-175 33
M +43-664-602 77-175 33
alexandra.frey@univie.ac.at

Jorg J.M. Massen, Ph.D. | EurekAlert!
Further information:
http://www.univie.ac.at

Further reports about: Cognitive Science Evolution Human vaccine chimpanzees human behaviour

More articles from Life Sciences:

nachricht Cancer diagnosis: no more needles?
25.05.2018 | Christian-Albrechts-Universität zu Kiel

nachricht Less is more? Gene switch for healthy aging found
25.05.2018 | Leibniz-Institut für Alternsforschung - Fritz-Lipmann-Institut e.V. (FLI)

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Powerful IT security for the car of the future – research alliance develops new approaches

The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.

Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...

Im Focus: Molecular switch will facilitate the development of pioneering electro-optical devices

A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.

The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

In focus: Climate adapted plants

25.05.2018 | Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

 
Latest News

In focus: Climate adapted plants

25.05.2018 | Event News

Flow probes from the 3D printer

25.05.2018 | Machine Engineering

Less is more? Gene switch for healthy aging found

25.05.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>