Three-Way Ordinal Non Symmetrical Correspondence Analysis for the Evaluation of the Patient Satisfaction

In some recent articles, emphasis has been given to the partition of the Goodman-Kruskal’s tau index using orthogonal polynomials (Emerson, 1968) for the study of the non symmetrical relations in three-way contingency tables. New graphical techniques that consider such a partition and allow for the analysis of asymmetric relationships have been proposed, including three-way ordinal non symmetrical correspondence analysis (Simonetti, 2003). Such a procedure takes into account the presence of ordinal predictor and response variables. In this paper we demonstrate the applicability of such a technique for the patient satisfaction evaluation.