Quotation Mair, Patrick, Hatzinger, Reinhold. 2007. CML based estimation of extended Rasch models with the eRm package in R. Psychology Science 49 (1): 26-43.




This paper presents an open source tool for computing extended Rasch models. It is realized in R (R Development Core Team, 2006) and available as package eRm. In addition to ordinary Rasch models extended models such as linear logistic test models, (linear) rating scale models and (linear) partial credit models can be estimated. A striking feature of this package is the implementation of conditional maximum likelihood estimation techniques which relate directly to Rasch's original concept of specific objectivity. The mathematical and epistemological benefits of this estimation method are discussed. Moreover, the capabilities of the eRm routine with respect to structural item response designs are demonstrated.


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Status of publication Published
Affiliation WU
Type of publication Journal article
Journal Psychology Science
Language English
Title CML based estimation of extended Rasch models with the eRm package in R
Volume 49
Number 1
Year 2007
Page from 26
Page to 43
URL http://www.psychologie-aktuell.com/fileadmin/download/PschologyScience/ps_1_2007_26-43.pdf


Mair, Patrick (Former researcher)
Hatzinger, Reinhold (Former researcher)
Institute for Statistics and Mathematics IN (Details)
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