15.2 In the multidimensional scaling model suppose the M dissimilarities are not known but there are N judges available to provide N sets of ordered dissimilarities. Two procedures are suggested:

(a) the ranks assigned by the N judges could be averaged, and

(b) the rank correlation matrix for the M dissimilarities could be determined. Compare the merits of carrying out the scaling using method

(a) as opposed to method (b).