The Fraternity Friendship Study team
The FFS team consists of three principal researchers, a number of associated researchers and assistants.
![H3 H3](https://i2.wp.com/www.theffs.nl/wp-content/uploads/2016/04/AdobeStock_77309951.jpg?w=700)
researchers
![Anna def Anna def](https://i1.wp.com/www.theffs.nl/wp-content/uploads/2016/04/Anna-def-300x417.jpg?resize=300%2C417)
Prof. Anna Rotkirch
Principal Investigator, Vaestoliitto Population Research Centre, Helsinki.
![logo logo](https://i1.wp.com/www.theffs.nl/wp-content/uploads/2016/04/logo-300x63.png?resize=300%2C63)
![9c3a8bef-ecb9-4960-8c66-ffd569bb07a8 9c3a8bef-ecb9-4960-8c66-ffd569bb07a8](https://i2.wp.com/www.theffs.nl/wp-content/uploads/2016/04/9c3a8bef-ecb9-4960-8c66-ffd569bb07a8-300x450.jpeg?resize=300%2C450)
Dr. Tamas David-Barrett
Researcher, Department of Experimental Psychology and Trinity College, University of Oxford.
![logo rechthoekig oxofrod logo rechthoekig oxofrod](https://i1.wp.com/www.theffs.nl/wp-content/uploads/2016/04/logo-rechthoekig-oxofrod--300x91.jpg?resize=300%2C91)
![Max def Max def](https://i0.wp.com/www.theffs.nl/wp-content/uploads/2016/04/Max-def-300x417.jpg?resize=300%2C417)
Dr. Max van Duijn
Researcher, Leiden Institute for Advanced Computer Science and Faculty of Humanities, Leiden University.
![6 6](https://i2.wp.com/www.theffs.nl/wp-content/uploads/2016/04/6-1-300x167.jpg?resize=300%2C167)
Associate researchers
Dr. Markus Jokela
Prof. Robin Dunbar
Associate Researcher, Institute of Behavioural Sciences, University of Helsinki
Associate Researcher, Department of Experimental Psychology and Magdalen College, University of Oxford.
support team
![Versie 2 Versie 2](https://theffs.nl/wp-content/uploads/bb-plugin/cache/Versie-2-150x150-circle.jpg)
![SubstandardFullSizeRender SubstandardFullSizeRender](https://theffs.nl/wp-content/uploads/bb-plugin/cache/SubstandardFullSizeRender-150x150-circle.jpg)
![IMG_0911 IMG_0911](https://theffs.nl/wp-content/uploads/bb-plugin/cache/IMG_0911-150x150-circle.jpg)
Rex van der Plas
ambassador and researchers-assistant.
Iris van Gorp
ambassador and researchers-assistant.
Heleen van der Heijden
ambassador and researchers-assistant.