Effects of Ignoring Clustered Data Structures in Factor Analysis: with Applications to Psychiatry - Couverture souple

Stochl, Jan

Couverture souple

ISBN 10 : 3659411914 ISBN 13 : 9783659411915

Editeur : LAP Lambert Academic Publishing, 2013

Synopsis

In psychiatric research, data for analysis originate principally from two sources: directly from the patients themselves and from interviews conducted by health care professionals. In the latter case, statistical theory indicates that clustering by interviewers or raters needs to be considered when performing any analyses including regression, factor analysis (FA) or item response theory (IRT) modelling of binary or ordinal data. We use simulated data to study the bias of factor analytic estimates and model fit indices when data clustering is fully or partly ignored. Robustness of different estimators, such as maximum likelihood, weighted least squares and Markov chain Monte Carlo is also presented. In the second part, we analyse two real datasets containing responses to the Positive and Negative Syndrome Scale (PANSS) to show the differences when the data are analysed using the correct multilevel approach rather than a traditional aggregated analysis.

A propos du livre

À propos de l?auteur

Jan Stochl is a Research Associate in the Department of Psychiatry at the University of Cambridge and Associate Professor at Charles University in the Czech Republic. His specialization is in statistical modellingwith latent variables.

Détails de l'édition

• Éditeur: LAP Lambert Academic Publishing
• Date d'édition: 2013
• Langue: anglais
• ISBN 10: 3659411914
• ISBN 13: 9783659411915
• Reliure: Broché
• Nombre de pages: 100
• Coordonnées du fabricant: non disponible
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