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Psychiatry has been rather poor at defining its own terms, and personality disorders particularly have suffered in this regard. Some personality types described represent little more than the personal opinions of psychiatrists. The overlap between several disorders leads to confusion, and it is not surprising that it proves difficult or impossible to subdivide people into discrete categories. Some findings are consistent and suggest that there is an excess of personality disorder among men, a decreasing rate with increasing age, …
F J Dunne (Sat,) studied this question.