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IRT models with relaxed assumptions in eRm: A manual-like instruction

Rusch, Thomas and Hatzinger, Reinhold (2009) IRT models with relaxed assumptions in eRm: A manual-like instruction. Psychology Science Quarterly, 51 (1). pp. 87-120. ISSN 1866-6140

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Abstract

Linear logistic models with relaxed assumptions (LLRA) as introduced by Fischer (1974) are a flexible tool for the measurement of change for dichotomous or polytomous responses. As opposed to the Rasch model, assumptions on dimensionality of items, their mutual dependencies and the distribution of the latent trait in the population of subjects are relaxed. Conditional maximum likelihood estimation allows for inference about treatment, covariate or trend effect parameters without taking the subjects' latent trait values into account. In this paper we will show how LLRAs based on the LLTM, LRSM and LPCM can be used to answer various questions about the measurement of change and how they can be fitted in R using the eRm package. A number of small didactic examples is provided that can easily be used as templates for real data sets. All datafiles used in this paper are available from http://eRm.R-Forge.R-project.org/.

Item Type: Article
Additional Information: To see the final version of this paper please visit the publisher's website. The original publication is available at www.pabst-publishers.com/. Access to the published version may require a subscription.
Keywords: LLRA / Rasch-models / repeated measurements / multidimensionality / eRm
Divisions: Departments > Finance, Accounting and Statistics
Version of the Document: Accepted for Publication
Variance from Published Version: Minor
Depositing User: ePub Administrator
Date Deposited: 08 May 2013 14:11
Last Modified: 19 Sep 2017 18:33
Related URLs:
FIDES Link: https://bach.wu.ac.at/d/research/results/45867/
URI: http://epub.wu.ac.at/id/eprint/3869

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