Grandiose narcissism is a multidimensional construct consisting of agentic and antagonistic aspects with markedly distinct correlates and consequences. However, this complexity has not been reflected in how grandiose narcissism is measured and investigated in forensic contexts. To provide a more nuanced picture of narcissism in a forensic context, we harnessed the Narcissistic Admiration and Rivalry Concept. More precisely, we investigated the psychometric properties of the Narcissistic Admiration and Rivalry Questionnaire–Short Scale (NARQ-S) in self- and informant reports of 199 male prisoners. Results confirmed the two-dimensional structure, acceptable internal consistency, moderate self-other agreement, and a differentiated nomological network for the NARQ-S. Admiration and rivalry showed distinct associations with criminal history, institutional misbehaviors, and social status in the group of prisoners. Together, the findings provide initial evidence for the validity and utility of self- and informant reports of the NARQ-S in forensic contexts and its contribution to security and treatment recommendations.

宏大的自恋是一个多维结构，由具有明显不同的相关性和后果的代理和对抗方面组成。然而，这种复杂性并没有反映在法医环境中如何衡量和调查宏大的自恋。为了在法医背景下提供更细致入微的自恋图景，我们利用了自恋的钦佩和竞争概念。更准确地说，我们在 199 名男性囚犯的自我和知情报告中调查了自恋钦佩和竞争问卷 - 短量表 (NARQ-S) 的心理测量特性。结果证实了 NARQ-S 的二维结构、可接受的内部一致性、适度的自我-其他一致性和差异化的法理网络。钦佩和竞争与犯罪史有着明显的联系，制度上的不当行为，以及囚犯群体中的社会地位。总之，这些发现为 NARQ-S 在法医环境中的自我和知情报告的有效性和实用性及其对安全和治疗建议的贡献提供了初步证据。