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Psychometrically Relevant Differences between Source and Migrant Populations

Series:

Patrick Brzoska

Psychometrically relevant population differences may limit the transferability of research instruments between migrants and their source population and may contribute to a low performance of quantitative questionnaires. Based on a review of existing taxonomies, this book develops a comprehensive analytical framework of equivalence that can serve multiple purposes. It allows to examine psychometrically relevant population differences, it can assist in the re-adaptation of questionnaires and it is a valuable tool for cross-group comparative research. The application of the framework is illustrated through the examination of equivalence of the Revised Illness Perception Questionnaire (IPQ-R) between chronically ill Turks residing in Turkey and Turkish migrants residing in Germany.
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Tab. 1: Risk of disability retirement after completion of medical rehabilitation by diagnosis prior to rehabilitation and by nationality

Tab. 2: Example of agglutination in the Turkish language

Tab. 3: Principal component analysis (varimax rotated solution) and internal consistency of IPQ-R part II items among Turkish migrants residing in Germany

Tab. 4: Principal component analysis (varimax rotated solution) and internal consistency of IPQ-R part III items among Turkish migrants residing in Germany

Tab. 5: Overview of the methods used in the two empirical research components of the present study

Tab. 6: Basic characteristics of the sample of Turks residing in Turkey stratified by sex

Tab. 7: Goodness-of-fit indices for the original and three modified models of the Turkish IPQ-R part II among the sample of Turks residing in Turkey

Tab. 8: Results of the confirmatory factor analysis of the modified final (baseline) measurement model (Model 2c: 34 items, 2 error covariances, item 6 respecified) of the Turkish IPQ-R part II in Turks residing in Turkey

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