Ranked preference data arise when a set of judges rank, in order of their preference, a set of objects. Such data arise in preferential voting systems and market research surveys. Covariate data associated with the judges are also often recorded. Such covariate data should be used in conjunction...

Most of practical methods for constructing positioning maps use as dependent variables data which are measured either on interval scales with normal distribution or on ordinal scales. Furthermore, ordinal data considered for this purpose are scores obtained either with Likert type items or with...