Hickendorff, dr. M. (Marian)

  • Assistant Professor
  • Mathematics education research
  • Solution strategies in mathematics
  • National and international educational assessments
  • Applied psychometrics
  • Latent variabele models
  • Item response theory

Telephone number: +31 (0)71 527 3765
E-Mail: mhickendorff@fsw.leidenuniv.nl
Faculty / Department: Faculteit der Sociale Wetenschappen, Instituut Pedagogische Wetenschappen, Onderwijsstudies
Office Address: Pieter de la Court gebouw
Wassenaarseweg 52
2333 AK Leiden
Room number 4A49

  • 2014-: assistant professor Educational Studies, Leiden University

  • 2006-heden: item developer Cito End of Primary School Test Mathematics

  • 2011-2015: assistant professor Methodology and Statistics, Institute of Psychology, Leiden University

  • 2011: PhD in Psychology, Leiden University, in collaboration with Cito National Institute for Educational Measurement

  • 2005: MSc in Psychology, Leiden University 


My research interests are both substantive and psychometric. Substantively, I study mathematics education in primary schools. In particular, I am interested in the type of solution strategies that students use on complex arithmetic problems such as 304 : 19 = ? - which can be for instance that they solve this problem with a written algorithm (‘staartdeling’ in Dutch) or solve this problem in their head - and how their strategy use relates to their achievement. Psychometrically, I am interested in application of different types of latent variable models to analyze this kind of data sets with strategy use and performance. In particular, my interest is in item response theory (IRT) and latent class analysis (LCA). As corollaries of my research interests, I have been working as an associate researcher supporting the KNAW Committee on Primary School Mathematics Teaching in 2009. See rapport 'Rekenonderwijs op de basisschool'.
October 2011, I defended my PhD thesis entitled Explanatory latent variable modeling of mathematical ability in primary school. Crossing the border between psychometrics and psychology. This research project involved collaboration between Leiden University and CITO, the National Institute for Educational Measurement. In my current position as Assistant Professor in Educational Studies, I am extending this research with new empirical studies on primary school mathematics.


  • Award for best publication by a PhD student in Psychology 2007-2008.  Leiden University

  • Van der Geer Award for best Master’s Thesis in Psychology, 2004-2005. Leiden University  


Scholarship PhD project research (2006-2011) by Cito, National Institute for Educational Measurement


  1. Member Dutch Committee on Tests and Testing (COTAN), Dutch Association of Psychologists (Nederlands Instituut van Psychologen, NIP)

  2. Postdoc member Interuniversity Graduate School of Psychometrics and Sociometrics (IOPS)

Last Modified: 09-02-2016