Abstract
Recently, individual difference scaling has become one of the most active fields of research in psychometrics. Numerous models and algorithms have been proposed but relatively little evidence as to the validity of the produced representations is available so far. To shed some new light on this issue we will reanalyze some data collected by Green and Rao (1972) via PINDIS (Procrustrean INdividual Difference Scaling). PINDIS is intimately related to the model underlying all presently available individual difference scaling algorithms but differs in important aspects which will allow a deeper insight into validity and interpretability of individual weights generated by them. To make our points clear, we will compare our results with those produced by INDSCAL which is (a) presently the most popular procedure, and (b) also the method of analysis chosen originally by Green and Rao (1972).
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