Psychopathy and narcissism are multidimensional constructs with substantial overlap. Low agreeableness (i.e., antagonism) features prominently in clinical and theoretical descriptions of both disorders. The authors examined whether antagonism components of their assessments accounted for the overlap between narcissism and psychopathy. Next, they tested whether the antagonism components were responsible for the relations that narcissism and psychopathy bore to aggression outcomes. Using multiple regression, the authors found that the low agreeableness component accounted for the majority of overlap between psychopathy and narcissism, nearly all of the variance in narcissism's relations with aggression outcomes, and the majority of variance in psychopathy's relations with aggression outcomes. Disinhibitory traits, which serve to distinguish psychopathy from narcissism, accounted for incremental variance in aggression outcomes for psychopathy. Results are discussed in the context of the overlap between narcissism and psychopathy. The authors argue that low agreeableness is largely responsible for the maladaptive outcomes associated with grandiose narcissism and psychopathy.

中文翻译：

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对抗的重要性：解释精神病和自恋与侵略和外化结果的关系的异同。

精神病和自恋是具有大量重叠的多维结构。低宜人性（即拮抗作用）在这两种疾病的临床和理论描述中具有显着特征。作者检查了他们评估中的拮抗成分是否解释了自恋和精神病之间的重叠。接下来，他们测试了拮抗成分是否对自恋和精神病与侵略结果之间的关系负责。使用多元回归，作者发现低宜人性成分占精神病和自恋之间重叠的大部分，几乎所有自恋与攻击结果关系的变异，以及精神病与攻击结果关系的大部分变异。去抑制特性，这有助于区分精神病和自恋，解释了精神病的侵略结果的增量差异。结果是在自恋和精神病之间重叠的背景下讨论的。作者认为，与夸大的自恋和精神病相关的适应不良结果的主要原因是低宜人性。