I have data at 3 groups (Groups are Scientists, Pastoralists and Researchers) and 10 Criteria (as a matrix, Groups are rows and criteria are columns). The each group has 30 repeats at. The scale of data is ordinal (Rank-based data from 1 to 9). I am going to find amount of overlay/similarity between 3 groups (or matrix) pay attention to variance of data. Which method or measure is useful for this purpose? Can I show this overlap as spectral scale?

Best regards

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