The Level of Personality Functioning Scale (LPFS) operationalizes Criterion A of the DSM-5 Alternative Model for Personality Disorders. Despite progress in LPFS measurement development and validation, there is a lack of research, and some disagreement, concerning structural, convergent, and incremental validity of LPFS self-report measures. The present study aimed to compare the LPFS Self-Report, LPFS Self-Report of Criterion A, and LPFS Brief Form. Internal structure was assessed through principal component analyses, factor analyses, and bifactor analyses of unidimensionality. Associations with both pathological and basic personality characteristics among the LPFS measures were explored. Incremental validity of LPFS severity in predicting pathological personality outcomes controlling for basic personality traits, and the reverse, were examined. Results suggest a unidimensional structure robustly associated with other pathological personality assessments. LPFS severity and basic personality traits mutually offered unique explanatory power. We discuss the implications of assessing personality pathology using LPFS self-report measures.

中文翻译：

---

检查人格障碍标准 A 的 DSM-5 替代模型的自我报告措施的结构和有效性。

人格功能量表水平 (LPFS) 使 DSM-5 人格障碍替代模型的标准 A 可操作。尽管在 LPFS 测量开发和验证方面取得了进展，但在 LPFS 自我报告测量的结构、收敛和增量有效性方面缺乏研究，并且存在一些分歧。本研究旨在比较 LPFS 自我报告、标准 A 的 LPFS 自我报告和 LPFS 简要表。内部结构通过主成分分析、因子分析和单维双因子分析进行评估。探讨了 LPFS 测量中与病理和基本人格特征的关联。检测了 LPFS 严重性在预测控制基本人格特征的病理人格结果方面的增量有效性，反之亦然。结果表明，一维结构与其他病态人格评估密切相关。LPFS 严重性和基本人格特征相互提供了独特的解释力。我们讨论了使用 LPFS 自我报告措施评估人格病理学的意义。