title: The Japanese version of the overall assessment of the speaker's experience of stuttering for adults (OASES-A-J): Translation and psychometric evaluation.
abstract: OBJECTIVE
  This study evaluates the psychometric performance of the Japanese version of the Overall Assessment of the Speaker's Experience of Stuttering for Adults (OASES-A), a comprehensive assessment tool of individuals who stutter.
  
  
  METHODS
  The OASES-A-J was administered to 200 adults who stutter in Japan. All respondents also evaluated their own speech (SA scale), satisfaction of their own speech (SS scale) and the Japanese translation version of the Modified Erickson Communication Attitude scale (S-24). The test-retest reliability and internal consistency of the OASES-A-J were assessed. To examine the concurrent validity of the questionnaire, Pearson correlation was conducted between the OASES-A-J Impact score and the S-24 scale, SA scale and SS scale. In addition, Pearson correlation among the impact scores of each section and total were calculated to examine the construct validity.
  
  
  RESULTS
  The OASES-A-J showed a good test-retest reliability (r=0.81-0.95) and high internal consistency (α>0.80). Concurrent validity was moderate to high (0.55-0.75). Construct validity was confirmed by the relation between internal consistency in each section and correlation among sections' impact scores. Japanese adults showed higher negative impact for 'General Information', 'Reactions to Stuttering' and 'Quality of Life' sections.
  
  
  CONCLUSIONS
  These results suggest that the OASES-A-J is a reliable and valid instrument to measure the impact of stuttering on Japanese adults who stutter. The OASES-A-J could be used as a clinical tool in Japanese stuttering field.
authors.affiliation: Department of Rehabilitation for Sensory Functions, Research Institute, National Rehabilitation Center for Persons with Disabilities (NRCD): 4-1 Namiki, Tokorozawa, Saitama 359-8555, Japan. Electronic address: sakai-naomi@rehab.go.jp.
authors.forename: Naomi
authors.initials: N
authors.lastname: Sakai
authors.affiliation: Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300 Kuala Lumpur, Malaysia.
authors.forename: Shin Ying
authors.initials: SY
authors.lastname: Chu
authors.affiliation: Department of Rehabilitation for Sensory Functions, Research Institute, National Rehabilitation Center for Persons with Disabilities (NRCD): 4-1 Namiki, Tokorozawa, Saitama 359-8555, Japan.
authors.forename: Koichi
authors.initials: K
authors.lastname: Mori
authors.affiliation: Communication Science and Disorders, University of Pittsburgh, 4033 Forbes Tower, Pittsburgh, PA 15260, United States.
authors.forename: J Scott
authors.initials: JS
authors.lastname: Yaruss
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D011594:Psychometrics / Q000379:methods*; D011788:Quality of Life; D013342:Stuttering / Q000523:psychology / Q000628:therapy*; D011795:Surveys and Questionnaires; D055815:Young Adult
keywords: ICF; OASES; Psychometric analysis; Quality of life; Stuttering