Eduard is a postdoc in the SYNC lab. A central question in his research is: Why do most teenagers grow up to be kind to others while a proportion engage in harmful, antisocial and risky behaviors? He is very much interested in how we can address these questions using neuroimaging methods in a robust, reproducible way. His main focus as a postdoc at Erasmus University will be to determine the optimal sample size in developmental studies for a range of fMRI tasks. 

Eduard was raised in Rotterdam and went to Leiden to be trained in developmental psychology and cognitive neuroscience (Research Master at Leiden University, 2011, Cum Laude). During his PhD (2011-2016) he investigated the neural mechanisms underlying social-emotional dysfunction in conduct disorder and autism spectrum disorders at Leiden University Medical Center. He then worked one-and-a-half year as a data-driven management consultant, after which he returned to academia. From 2017-2020, he worked as a postdoc in the Brain and Development Research Center at Leiden University where he worked on large-scale collaborative projects focused on brain morphology. Since 2019, he is also a co-chair of the ENIGMA Working Group on Antisocial Behavior, an international collaboration aimed at performing large-scale meta- and mega-analyses of neuroimaging data (

Research interests: brain development, reliable science, antisocial behavior, social neuroscience

Klapwijk, E., van den Bos, W., Tamnes, C. K., Mills, K., & Raschle, N. (in revision). Opportunities for increased reproducibility and replicability of developmental cognitive neuroscience. 

Thompson, P. M., Jahanshad, N., Ching, C. R., Salminen, L. E., Thomopoulos, S. I., Bright, J., …, Klapwijk, E.T., … & Bülow, R. (2020). ENIGMA and global neuroscience: A decade of large-scale studies of the brain in health and disease across more than 40 countries. Translational Psychiatry, 10(1), 1-28. 

Scotti, P., Kulkarni, A., Mazor, M., Klapwijk, E., Yarkoni, T., & Huth, A. (2020). EduCortex: browser-based 3D brain visualization of fMRI meta-analysis maps. Journal of Open Source Education, 3(26), 75. 

Klapwijk, E.T., van de Kamp, F., van der Meulen, M., Peters, S., & Wierenga, L.M. (2019). Qoala-T: A supervised-learning tool for quality control of FreeSurfer segmented MRI data. Neuroimage, 189, 116-129. 

Klapwijk, E. T., & Crone, E. A. (2019). De ontwikkeling van het sociale brein: meer begrip van sociale en antisociale trajecten. Neuropraxis, 23(5), 101-106. 

Aghajani M., Klapwijk E.T., Colins O.F., Ziegler C., Domschke K., Vermeiren R.R.J.M. & van der Wee N.J. (2018). Interactions between oxytocin receptor gene methylation and callous- unemotional traits impact socioaffective brain systems in conduct-disordered offenders. Biological Psychiatry: Cognitive Neuroscience and Neuroimaging, 3, 379-391. 

Schreuders, E., Klapwijk, E.T., Will, G.-J., & Güroğlu, B. (2018). Friend versus Foe: Neural correlates of prosocial decisions for liked and disliked peers. Cognitive, Affective, & Behavioral Neuroscience, 18, 127–142. 

Klapwijk, E.T., Aghajani, M., Lelieveld, G.J., van Lang, N.D., Popma, A., van der Wee, N.J., Colins, O.F., Vermeiren, R.R.J.M. (2017). Differential fairness decisions and brain responses after expressed emotions of others in boys with autism spectrum disorders. Journal of Autism and Developmental Disorders, 47, 2390-2400. 

Aghajani, M., Klapwijk, E.T., van der Wee, N. J.A., Veer, I.M., Rombouts, S.A.R.B., Boon, A.E., van Beelen, P., Popma, A., Vermeiren, R.R.J.M., Colins, O.F. (2017). Disorganized Amygdala Networks in Conduct-Disordered Juvenile Offenders with Callous-Unemotional Traits. Biological Psychiatry, 82, 283-293. 

Klapwijk E.T., van den Bos, W., Güroğlu, B. (2017). Neural mechanisms of criminal decision making in adolescence. In W. Bernasco, H. Elffers, J.-L. Van Gelder (Eds.), Oxford Handbook of Offender Decision Making (pp. 246-267). New York: Oxford University Press. 

Klapwijk, E.T., Lelieveld, G.J., Aghajani, M., Boon, A.E., van der Wee, N.J., Popma, A., Vermeiren, R.R.J.M., Colins, O.F. (2016). Fairness decisions in response to emotions: a functional MRI study among criminal justice-involved boys with conduct disorder. Social Cognitive and Affective Neuroscience, 11, 674-682. 

Aghajani, M., Colins, O.F., Klapwijk, E.T., Veer, I.M., Andershed, H., Popma, A., van der Wee, N.J.A., Vermeiren, R.R.J.M. (2016). Dissociable relations between amygdala subregional networks and psychopathy trait dimensions in conduct-disordered juvenile offenders. Human Brain Mapping, 37, 4017-4033. 

Klapwijk, E.T., Aghajani, M., Colins, O.F., Marijnissen, G.M., Popma, A., van Lang, N.D., van der Wee, N.J.A., Vermeiren, R.R.J.M. (2016). Different brain responses during empathy in autism spectrum disorders versus conduct disorder and callous-unemotional traits. Journal of Child Psychology and Psychiatry. 57, 737-747. 

Will, G.-J., & Klapwijk, E.T. (2014). Neural systems involved in moral judgment and moral action. Journal of Neuroscience, 34,10459-10461. 

Klapwijk, E.T., Peters, S., Vermeiren, R.R.J.M., Lelieveld, G.J. (2013). Emotional reactions of peers influence decisions about fairness in adolescence. Frontiers in Human Neuroscience, 7, 745. 

Güroğlu, B., Will, G.-J., Klapwijk E.T. (2013). Some bullies are more equal than others: Peer relationships modulate altruistic punishment of bullies after observing ostracism. International Journal of Developmental Science, 7, 13-23. 

Klapwijk, E.T., Goddings, A.-L., Burnett Heyes, S., Bird, G., Viner R.M., Blakemore, S.-J. (2013). Increased functional connectivity with puberty in the mentalising network involved in social emotion processing. Hormones and Behavior, 64, 314-322.