The prototypal approach used in DSM-IV-TR indicates that it is not necessary that any single characteristic listed for the personality disorders be shared by all who would receive this diagnosis.

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The prototypal approach in DSM-IV-TR allows for the diagnosis of a personality disorder even if not all characteristics listed are present in every individual with that disorder. The diagnosis is based on the presence of a core set of features or characteristics, which serve as a prototype for that disorder.

The Prototypal Approach Used in DSM-IV-TR Indicates That It Is