New Developments in Mokken Scale Analysis inR | Zendy

L. Andries van der Ark | Zendy

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New Developments in Mokken Scale Analysis inR

Author(s) -

L. Andries van der Ark

Publication year - 2012

Publication title -

journal of statistical software

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 7.636

H-Index - 145

ISSN - 1548-7660

DOI - 10.18637/jss.v048.i05

Subject(s) - computer science , scaling , scalability , transitive relation , polytomous rasch model , computation , scale (ratio) , software , item response theory , data mining , algorithm , mathematics , statistics , programming language , database , psychometrics , cartography , geography , geometry , combinatorics

Mokken (1971) developed a scaling procedure for both dichotomous and polytomous items that was later coined Mokken scale analysis (MSA). MSA has been developed ever since, and the developments until 2000 have been implemented in the software package MSP (Molenaar and Sijtsma 2000) and the R package mokken (Van der Ark 2007). This paper describes the new developments in MSA since 2000 that have been implemented in mokken since its first release in 2007. These new developments pertain to invariant item ordering, a new automated item selection procedure based on a genetic algorithm, inclusion of reliability coefficients, and the computation of standard errors for the scalability coefficients. We demonstrate all new applications using data obtained with a transitive reasoning test and a personality test.

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