Application of single-level and multi-level Rasch models using the lme4 package

J Appl Meas. 2013;14(1):79-90.


The aim of the article is to illustrate how researchers may use the lme4 package to run multilevel Rasch models. The lme4 package is a popular open-source software and is frequently used by researchers around the world to fit generalized mixed-effects models with crossed or partially crossed random effects. The article starts with a short discussion of the reasons why a researcher might, sometimes, be motivated to use a multi-level Rasch model and presents a practical example using empirical data. The main features of the lme4 package are presented, and finally, the paper presents information about other open-source software that could alternatively be used to fit multi-level Rasch models.

MeSH terms

  • Algorithms*
  • Computer Simulation
  • Data Interpretation, Statistical*
  • Effect Modifier, Epidemiologic
  • Matched-Pair Analysis*
  • Models, Statistical*
  • Psychometrics / methods*
  • Software Validation
  • Software*
  • Statistics as Topic