PhD students


I am currently the primary advisor and co-promotor of four PhD students: Katherina Alvarez, Ali Mashuri, Omar Burhan, and Bramesada Prasastyoga.

UnknownWith financial support from NWO, Katherina Alvarez, MSc, Prof. Mark van Vugt and I are looking into the social and psychological consequences of receiving welfare support among Spanish and Indigenous Panamanians. We show that recipients of help in the form of cash feel more empowered and in control of their own lives than recipients of food vouchers. We are also investigating the effectiveness of peer-to-peer helping networks, in which communities receive specific skills training from an outside expert, and subsequently pass on their knowledge and skills in similar trainings to other communities.

8d1c84f5af591ac3f8_l_aa009With financial support from Nuffic, Ali Mashuri, MSc, and I are currently looking at the social psychological determinants and consequences of separatism conflict in Indonesia. We study separatism conflict as the result of a multidimensional form of identity threat. We demonstrate that the separatist movement feels rejected and overpowered by the majority, while the majority simultaneously feels rejected by the separatist movement.

screenshot_124Supported by a fellowship from LPDP, Omar Burhan, MSc, Daan Scheepers, and I are investigating the effects of nepotism in organisational contexts. Omar started his project 1st September 2015.


Bramesada Prasastyoga started his PhD in February 2016. Supported by a fellowship from LPDP, he is investigating the role of empowerment in the growth of micro and small enterprises in Indonesia. He is co-supervised by Fieke Harinck.


reitsmaDr. Margreet Reitsma-van Rooijen successfully defended her dissertation, titled Consequences of the Linguistic Intergroup Bias: Investigation of emotional, motivational, and behavioural consequences of linguistic variations in communication, on 14th February 2008. She was supervised by Prof. Gün Semin (promotor) and myself (co-promotor).

3e074d6I was also the primary advisor and co-promotor for Dr. Petra Hopman, who succesfully defended her dissertation, titled Group members reflecting on intergroup relations, on 1st October 2010. Her promotor was Prof. Paul van Lange.