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Wilderjans, Tom F.; Ceulemans, E.; Van Mechelen, I. – Psychometrika, 2012
In many research domains different pieces of information are collected regarding the same set of objects. Each piece of information constitutes a data block, and all these (coupled) blocks have the object mode in common. When analyzing such data, an important aim is to obtain an overall picture of the structure underlying the whole set of coupled…
Descriptors: Semantics, Simulation, Multivariate Analysis, Matrices
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Janoos, Firdaus; Brown, Gregory; Morocz, Istvan A.; Wells, William M., III – Psychometrika, 2013
The neural correlates of "working memory" (WM) in schizophrenia (SZ) have been extensively studied using the multisite fMRI data acquired by the Functional Biomedical Informatics Research Network (fBIRN) consortium. Although univariate and multivariate analysis methods have been variously employed to localize brain responses under differing task…
Descriptors: Brain, Diagnostic Tests, Short Term Memory, Cognitive Processes
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Steinley, Douglas; Brusco, Michael J. – Psychometrika, 2008
Eight different variable selection techniques for model-based and non-model-based clustering are evaluated across a wide range of cluster structures. It is shown that several methods have difficulties when non-informative variables (i.e., random noise) are included in the model. Furthermore, the distribution of the random noise greatly impacts the…
Descriptors: Models, Comparative Analysis, Multivariate Analysis, Evaluation Methods