The Levels of Personality Functioning Scale-Self-Report (LPFS-SR) is a freely available self-report instrument that corresponds directly in content to the DSM-5 Alternative Model of Personality Disorders (AMPD) Criterion A, which assesses global pathology of personality functioning. The present study translated the LPFS-SR into Persian and examined the psychometrics of the translated measure in a sample of 471 college students and 142 hospitalized patients with a diagnosed personality disorder (PD). Results indicate that the Persian translation of the LPFS-SR is highly internally consistent and concurrently valid with related indicators of personality pathology. Additionally, the LPFS-SR significantly discriminated between the college sample and clinical sample, while also demonstrating considerable incremental validity over the Structured Clinical Interview for DSM-IV-TR Axis II Personality Questionnaire (SCID-II-PQ) in the prediction of personality disorder diagnosis. The majority of indices supported a unidimensional structure for the LPFS-SR. Six items showed negative item-total correlations and may necessitate refinement in order to capture pathology-related content more adequately for Iranian culture. Overall, the findings of the present study support the use of the Persian translation of the LPFS-SR.
The current classification of personality disorder in ICD-11 includes a description of personality functioning, derived from a number of theoretical paradigms, but most notably consistent with the psychodynamic approach. Concurrently, an object-relations model of personality functioning in a dimensional assessment of severity is provided in the Structured Interview of Personality Organization-Revised (STIPO-R). To date, there are no published measures of International Classification of Diseases-11 (ICD-11) personality severity, though the construct is very comparable to the concepts assessed in the Diagnostic and Statistical Manual of Mental Disorders-5 (DSM-5) levels of personality functioning concept, which is measured by the Level of Personality Functioning Scale-Self-Report (LPFS-SR). This study examined the validity of ICD-11 personality functioning, as measured by the LPFS-SR, by evaluating its associations with the STIPO-R in Kurdistan region. The samples included 231 University students and 419 inpatient participants across four hospitals (267 with a diagnosed personality disorder). All the components of LPFS-SR and STIPO-R were positively and significantly intercorrelated. The components of each measure discriminated PD and non-PD patients from a University, non-clinical group adequately. Despite slightly better performance of the STIPO-R in this discrimination, the measures had a high congruence in predicting personality dysfunction. Overall, the findings of the present study support the validity of ICD-11 construct for evaluating personality functioning.
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