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Autor:
Hartig, Johannes; Hölzel, Britta; Moosbrugger, Helfried:

Titel:
A Confirmatory Analysis of Item Reliability Trends (CAIRT).
Differentiating True Score and Error Variance in the Analysis of Item Context Effects.

Quelle:
In: Multivariate Behavioral Research, 42 (2007) 1 , S. 157-183

Dokumenttyp:
Zeitschriftenaufsatz; Zeitschriftenaufsatz/referiert,statusäquivalent

Schlagwörter:
Persönlichkeitstest, Itemanalyse, Reliabilität, Methode


Abstract(englisch):
Numerous studies have shown increasing item reliabilities as an effect of the item position in personality scales. Traditionally, these context effects are analyzed based on item-total correlations. This approach neglects that trends in item reliabilities can be caused either by an increase in true score variance or by a decrease in error variance. The paper presents the Confirmatory Analysis of Item Reliability Trends (CAIRT), a method that allows to estimate trends in true score and error variances separately within a SEM framework. Results of a simulation study prove the CAIRT method to provide reliable and independent parameter estimates. The power for detecting trends in item reliabilities exceeds the traditional analysis of item-total correlations. (DIPF/Author)


DIPF-Abteilung:
Bildungsqualität und Evaluation

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zuletzt verändert: 11.11.2016