Developing and validating the Japanese version of Quick Evaluation of Severity over Time to assess borderline personality disorder symptoms in young adults

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  • Isato Ayako
    Faculty of Psychology, RISSHO University
  • Fujisato Hiroko
    National Center for Cognitive Behavior Therapy and Research, 
National Center of Neurology and Psychiatry
  • Yamada Keisuke
    Faculty of Industrial Researches and Social Services, Tsukuba International University
  • Okubo Chisa
    Graduate School of Clinical Psychology, Teikyo Heisei University
  • Miyamae Mitsuhiro
    Department of Functional Brain Research, National Institute of Neuroscience, 
National Center of Neurology and Psychiatry
  • Terashima Hitomi
    School of Humanities, Wayo Women’s University

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Other Title
  • 青年におけるBPD症状の重症度を捉えるJapanese version of Quick Evaluation of Severity over Time（QuEST-J）の開発と信頼性・妥当性の検討

Abstract

The symptoms of borderline personality disorder (BPD) are often observed in young adults. They have difficulty in adaptation. Therefore, it is important to assess the extent of their BPD symptoms to ascertain intervention. However, there is no scale to assess BPD symptoms and their changes in young adults in Japan. Therefore, we developed a Japanese version of the Quick Evaluation of Severity over Time (QuEST-J) to assess these symptoms and investigated the reliability and validity of this scale in a sample of Japanese undergraduates (N＝733). QuEST-J comprises three sub-scales: “Thoughts and Feelings,” “Behaviors-Negative,” and “Behaviors-Positive.” A confirmatory factor analysis corroborates the factorial validity. Moreover, the results indicate enough internal consistency, test-retest reliability, and criterion-related validity. Therefore, QuEST-J is a reliable and valid scale to assess BPD symptoms in young adults.

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