IOPS Staff at Leiden University

Research Methodology, Department of Psychology, Faculty of Social Sciences

Dr Z. (Zsuzsa) Bakk
E-mail Zsuzsa Bakk

Prof. M.J. (Mark) De Rooij
Tel: 071 527 4102 (secretary: 071 527 3761)
E-mail: Mark De Rooij, personal web page: Mark De Rooij

Dr E.M.L. (Elise) Dusseldorp
E-mail: Elise Dusseldorp, personal webpage: Elise Dusseldorp

Dr M. (Marjolein) Fokkema
Tel: +31 (0)71 527 7996
E-mail Marjolein Fokkema, personal academic webpage Marjolein Fokkema

Prof. H. (Henk) Kelderman
Tel.: 071 527 3761 (secretary: 071 527 3761)
Email: Henk Kelderman, personal web page:

Dr J.R. (Joost) Van Ginkel
Tel.: 071 527 3620 (secr.: 071 527 4105)
E-mail: Joost van Ginkel, personal web page: Joost van Ginkel

Dr. M.G.E. (Mathilde) Verdam
E-mail Mathilde Verdam

Dr Wouter Weeda
Tel: 071-527 8047
E-mail Wouter Weeda

Dr T.F. (Tom) Wilderjans
Tel: 071 527 6058
E-mail Tom Wilderjansacademic webpage Tom Wilderjans

Child and Family Studies, Department of Education, Faculty of Social Sciences

Dr M. (Marjan) Hickendorff
Tel.: 071 527 3765 (secretary: 071 527 3761)
E-mail: Marian Hickendorff, personal web page: Marian Hickendorff

Mathematical Institute, Faculty of Science

Prof. J.J. (Jacqueline) Meulman
E-mail: Jacqueline Meulman, personal web page: Jacqueline Meulman