title: Modified attitudes to psychiatry scale created using principal-components analysis.
abstract: OBJECTIVE
  The Attitudes to Psychiatry Scale (APS) is a tool used to assess medical students' attitudes toward psychiatry. This study sought to examine the internal validity of the APS in order to identify dimensions within the questionnaire.
  
  
  METHODS
  Using data collected from 549 medical students from India and Ghana, the authors analyzed 28 questions of the APS independently of the original five dimensions defined by Balon et al. in the original APS questionnaire, using principal-components analysis to test whether questions correlated to form dimensions within the questionnaire. The data were further tested for redundancy by Cronbach alpha.
  
  
  RESULTS
  The investigation yielded five dimensions, but, on filtering the information, there was good independent correlation in four of the five dimensions emerging from the analysis. These were (1) inspiration from medical school; (2) the stigma of psychiatry; (3) the merits of psychiatry as scientific medicine; and (4) the effectiveness of treatment, from which a suggested edited scale emerged.
  
  
  CONCLUSIONS
  On examining the APS scale using principal-components analysis, the authors found clusters of questions around four themes that do seem intuitively relevant for attitudes toward psychiatry. They are not the same as Balon et al. 's original subscales, although there are similarities. Using the questions in the emerging themes, the authors have suggested a modified questionnaire that appears to have good internal validity.
authors.affiliation: Cornwall Partnership NHS Trust, Learning Disabilities, Developmental Neuropsychiatry, Royal Cornwall Hospital, Truro, Cornwall.
authors.forename: Rohit
authors.initials: R
authors.lastname: Shankar
authors.forename: Richard
authors.initials: R
authors.lastname: Laugharne
authors.forename: Colin
authors.initials: C
authors.lastname: Pritchard
authors.forename: Pallavi
authors.initials: P
authors.lastname: Joshi
authors.forename: Romika
authors.initials: R
authors.lastname: Dhar
mesh_terms: D001290:Attitude; D002321:Career Choice; D003431:Cross-Cultural Comparison; D005260:Female; D005869:Ghana; D006801:Humans; D007194:India; D008297:Male; D025341:Principal Component Analysis; D011570:Psychiatry / Q000193:education*; D011594:Psychometrics / Q000706:statistics & numerical data; D013337:Students, Medical / Q000523:psychology*; D011795:Surveys and Questionnaires