Clemens Draxler

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Fit indices are widely used in order to test the model fit for structural equation models. In a highly influential study, Hu and Bentler (1999) showed that certain cutoff values for these indices could be derived, which, over time, has led to the reification of these suggested thresholds as "golden rules" for establishing the fit or other aspects of(More)
This paper refers to the exponential family of probability distributions and the conditional maximum likelihood (CML) theory. It is concerned with the determination of the sample size for three groups of tests of linear hypotheses, known as the fundamental trinity of Wald, score, and likelihood ratio tests. The main practical purpose refers to the special(More)
*Correspondence: rainer.alexandrowicz@aau.at 1Department of Psychology, Applied Psychology and Methods Research Unit, Universitaetsstr. 65, 9020 Klagenfurt, Austria Full list of author information is available at the end of the article Abstract Background: The Rasch model allows for a conditional likelihood ratio goodness of fit test. The speed of(More)
The Rasch model is known in particular for its properties of parameter separability and specific objectivity. The extent to which this property is attained depends on the magnitude of the discrepancy between the data and the model. The use of reliable model fit tests which can detect model violations is therefore essential before a psychological test is(More)
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