Research article
Motor function in Parkinson's disease and supranuclear palsy: simultaneous factor analysis of a clinical scale in several populations
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* Corresponding author: Pieter M Kroonenberg kroonenb@fsw.leidenuniv.nl
1 Department of Education and Child Study, Wassenaarseweg 52, Leiden University, Leiden, The Netherlands
2 Department of Medical Psychology, Academic Medical Centre, University of Amsterdam, The Netherlands
3 Department of Neurological Sciences, Rush-Presbyterian-St. Luke's Medical Center, Chicago, Illinois, USA
BMC Medical Research Methodology 2006, 6:26 doi:10.1186/1471-2288-6-26
Published: 13 June 2006Additional files
Additional file 1:
Principal component analysis and confirmatory factor analysis and the use of restrictions: A brief comment. In this file the differences between exploratory component analysis and confirmatory factor analysis are discussed in more detail than in the paper and the principles of imposing restrictions for refined model building are explained.
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Additional file 2:
Simplified LISREL script for final analysis. The file contains a simplified version of the LISREL script which was used to estimate the parameters of the model reported in this paper. Full detailed scripts for all analyses can be obtained from the first author.
Format: DOC Size: 29KB Download file
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