This study aimed to develop a Japanese version of the Level of Personality Functioning Scale-Brief Form 2.0 (J-LPFS-BF 2.0), which is used to measure the levels of personality functioning organized as Criterion A of the alternative DSM-5 model of personality disorders. We also tested the validity and reliability of the J-LPFS-BF 2.0. Data for 291 adults were collected via an Internet survey. Confirmatory factor analysis indicated the J-LPFS-BF 2.0 had a two-factor structure (“self-functioning” and “interpersonal functioning”) that was common to both men and women, and sufficient internal consistency. The scale's test-retest reliability was also confirmed. Correlation analysis showed the J-LPFS-BF 2.0 was closely related to the severity of pathological personality, identity problems, and interpersonal problems. The results indicated the J-LPFS-BF 2.0 had acceptable validity and reliability. This instrument will make it possible to provide appropriate clinical psychological assistance tailored to the individual's level of personality functioning. It will also allow comparison of empirical research findings regarding personality disorders at the international level.
Kojun Shibata (Thu,) studied this question.