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Different applicatiions require different systems of cluster analysis. The ways in which systems differ are pointed out. The present system was designed originally; to identify, in a homogeneous callection of questionnaire or inventory items or of tests, groups of items which can be scored as subtests, or groups of tests which can be combined to yield globa1-trait scores, but it may well be applicable to other problems.
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Cureton et al. (1970) studied this question.
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