A clusterwise simultaneous component method for capturing within-cluster differences in component variances and correlationsDe Roover, K., Ceulemans, E., Timmerman, M. E. & Onghena, P., Feb-2013, In : British journal of mathematical & statistical psychology. 66, 1, p. 81-102 22 p.
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This paper presents a clusterwise simultaneous component analysis for tracing structural differences and similarities between data of different groups of subjects. This model partitions the groups into a number of clusters according to the covariance structure of the data of each group and performs a simultaneous component analysis with invariant pattern restrictions (SCA-P) for each cluster. These restrictions imply that the model allows for between-group differences in the variances and the correlations of the cluster-specific components. As such, clusterwise SCA-P is more flexible than the earlier proposed clusterwise SCA-ECP model, which imposed equal average cross-products constraints on the component scores of the groups that belong to the same cluster. Using clusterwise SCA-P, a finer-grained, yet parsimonious picture of the group differences and similarities can be obtained. An algorithm for fitting clusterwise SCA-P solutions is presented and its performance is evaluated by means of a simulation study. The value of the model for empirical research is illustrated with data from psychiatric diagnosis research.
|Number of pages||22|
|Journal||British journal of mathematical & statistical psychology|
|Publication status||Published - Feb-2013|
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