title: Psychometric Properties of a Short Korean Version of the Revised Obsessive Intrusion Inventory.
abstract: OBJECTIVE
  The Revised Obsessive Intrusion Inventory (ROII) is a 52-item scale that evaluates obsessional intrusive thoughts. The aim of the present study was to validate a short, 20-item Korean version of the ROII (ROII-20).
  
  
  METHODS
  Of the 1125 participants who completed the ROII-20, 895 participants completed the scale to examine the factor structure of the scale. A subgroup of these participants (n=53) completed the scale twice to determine test-retest reliability. To establish external validity, 230 participants completed the scale and other questionnaires.
  
  
  RESULTS
  Exploratory factor analyses suggested a hierarchical model comprising two higher order factors of autogenous obsessions (resulting from aggressive thoughts and sexual thoughts) and reactive obsessions (resulting from thoughts about contamination, thoughts about accidents, and thoughts about dirt). Confirmatory factor analyses supported this model. The results indicated good internal consistency and test-retest reliability. External validity was supported by relationships with obsessive-compulsive symptoms and general distress.
  
  
  CONCLUSIONS
  The ROII-20 presents good psychometric properties and may be considered as a promising instrument for measuring obsessional intrusions.
authors.affiliation: Department of Psychology, Seoul National University, Seoul, Republic of Korea.
authors.forename: Jang-Won
authors.initials: JW
authors.lastname: Seo
authors.affiliation: Department of Psychiatry, Yeonsei Feel Hospital, Seoul, Republic of Korea.
authors.forename: Min-Jung
authors.initials: MJ
authors.lastname: Baek
authors.affiliation: Department of Psychiatry, Seoul National University Hospital, Seoul, Republic of Korea.
authors.forename: Mi-So
authors.initials: MS
authors.lastname: Lee
authors.affiliation: Department of Psychiatry, Samsung Medical Center, Seoul, Republic of Korea.
authors.forename: Ju-Ri
authors.initials: JR
authors.lastname: Jeon
authors.affiliation: Department of Psychology, Seoul National University, Seoul, Republic of Korea.
authors.forename: Seok-Man
authors.initials: SM
authors.lastname: Kwon
keywords: Autogenous obsessions; Mental intrusions; Mental intrusions questionnaire; Reactive obsessions; Reliability; Validity