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The value of hierarchical grouping in comparing group MMPI profiles was explored and discussed. Hierarchical grouping is a computer-assisted statistical procedure which compares profiles of scores simultaneously over a series of variables, forming groups of the profiles that are most similar. Two sets of MMPI profiles were examined: 35 criterion profiles from the literature and the criterion profile types identified by Gilberstadt and Duker. Results indicated the program's success in grouping logically similar profiles. In both the first set of 35 profiles and in the combined group of 54 profiles the majority of groupings appeared logically consistent with the populations represented by the group profiles. Agreements and differences with expected results were discussed. Implications of the findings for further development of the procedure were presented.

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