title: Application of single-level and multi-level Rasch models using the lme4 package.
abstract: 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.
authors: University of Cyprus, Cyprus. iasonas@ucy.ac.cy
authors: Iasonas
authors: I
authors: Lamprianou
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D003627:Data Interpretation, Statistical; D015987:Effect Modifier, Epidemiologic; D016555:Matched-Pair Analysis; D015233:Models, Statistical; D011594:Psychometrics / Q000379:methods*; D012984:Software; D012986:Software Validation; D013223:Statistics as Topic