[Rasch] PCA of Resisuals from MFRM analysis - practical tips?

Imogene Rothnie irothnie at usyd.edu.au
Wed Mar 17 19:05:37 EST 2010



Does anyone have any practical tips for running a PCA of stdsd residuals
from a multi faceted rasch analysis? I'm trying to evaluate
unidimensionality and many readings and conversations have pointed to
running a PCA analysis of residuals from MFRM output, but in practical
terms I'm struggling with how to do this. There is output from FACETS
(Mike Linacre's software) that gives standardised residual for every
interaction of elements in facets, but how can I transform this into
something useful to run PCA in say SPSS? 







IMOGENE ROTHNIE | Lecturer (Assessment) 
Office of Medical Education | Faculty of Medicine             

Rm 108, Edward Ford Bdg  A27 | The University of Sydney | NSW | 2006

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