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Erschienen in: neuropsychiatrie 4/2015

01.12.2015 | original article

Using Rasch-models to compare the 30-, 20-, and 12-items version of the general health questionnaire taking four recoding schemes into account

verfasst von: PhD Ao.Univ.Prof. Mag.Dr. Rainer W. Alexandrowicz, MD Fabian Friedrich, MD Rebecca Jahn, MD Nathalie Soulier

Erschienen in: neuropsychiatrie | Ausgabe 4/2015

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Summary

Background

The present study compares the 30-, 20-, and 12-items versions of the General Health Questionnaire (GHQ) in the original coding and four different recoding schemes (Bimodal, Chronic, Modified Likert and a newly proposed Modified Chronic) with respect to their psychometric qualities.

Methods

The dichotomized versions (i.e. Bimodal, Chronic and Modified Chronic) were evaluated with the Rasch-Model and the polytomous original version and the Modified Likert version were evaluated with the Partial Credit Model.

Results

In general, the versions under consideration showed agreement with the model assumption. However, the recoded versions exhibited some deficits with respect to the Outfit index.

Conclusions

Because of the item deficits and for theoretical reasons we argue in favor of using the any of the three length versions with the original four-categorical coding scheme. Nevertheless, any of the versions appears apt for clinical use from a psychometric perspective.
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Metadaten
Titel
Using Rasch-models to compare the 30-, 20-, and 12-items version of the general health questionnaire taking four recoding schemes into account
verfasst von
PhD Ao.Univ.Prof. Mag.Dr. Rainer W. Alexandrowicz
MD Fabian Friedrich
MD Rebecca Jahn
MD Nathalie Soulier
Publikationsdatum
01.12.2015
Verlag
Springer Vienna
Erschienen in
neuropsychiatrie / Ausgabe 4/2015
Print ISSN: 0948-6259
Elektronische ISSN: 2194-1327
DOI
https://doi.org/10.1007/s40211-015-0160-z