Levels of Personality Functioning Questionnaire (LoPF-Q 12–18) is a scale developed for adolescents to assess impairments in personality functioning inspired by criterion A in the Alternative Models for Personality Disorder (AMPD) in DSM-5 and the upcoming ICD-11. In this study, we aim to evaluate the validity and reliability of a Turkish culture-adaption of LoPF-Q 12–18. The study was conducted with a student (n = 282) and a clinical sample (n = 52), 41% of the participants were male, and 59% were female. The questionnaire showed good scale reliability alpha and a sound unidimensional factor structure build of four scales of functioning: Identity, Self-direction, Empathy, and Intimacy. Aspects of convergent and discriminant validity were evaluated using the Strengths and Difficulties Questionnaire (SDQ). There were medium to strong positive relationships between the LoPF-Q 12–18 and the SDQ scores reflecting pathology in line with theory. Clinical validity could be demonstrated, the LoPF-Q 12–18 total score differed significantly and with a large effect size of 1.2 standard deviations between the school sample and a sample of N = 25 patients with diagnosed PD. In general, our results support the validity of the Turkish version of the LoPF-Q 12–18 and emphasize the benefits of using the dimensional severity concept for the classification of personality disorders already in adolescence.

人格功能问卷调查表（LoPF-Q 12-18）是为青少年开发的量表，用于评估DSM-5和即将到来的ICD-11中人格障碍替代模型（AMPD）中的标准A激发的人格功能障碍。在这项研究中，我们旨在评估LoPF-Q 12-18土耳其文化适应的有效性和可靠性。该研究是由一名学生（n  = 282）和一个临床样本（n = 52），其中41％的参与者是男性，而59％是女性。问卷显示了良好的量表可靠性α和健全的一维因素结构，该结构由四个功能量表构成：身份，自我指导，同理心和亲密关系。使用优缺点调查表（SDQ）评估了收敛效度和判别效度的各个方面。LoPF-Q 12-18和SDQ评分之间存在中等至强的正相关关系，反映出符合理论的病理学。可以证明其临床有效性，LoPF-Q 12-18总分差异显着，并且学校样本和N样本之间的有效差异为1.2标准差 = 25例诊断为PD的患者。总的来说，我们的结果支持LoPF-Q 12-18土耳其文版本的有效性，并强调了使用维度严重性概念对青春期已经存在的人格障碍进行分类的好处。