title: Dimensional structure of the Frankfurt Complaint Questionnaire in a sample of French students.
abstract: BACKGROUND
  The Frankfurt Complaint Questionnaire (FCQ) is a questionnaire designed to evaluate the subjective symptoms of schizophrenics. In schizophrenic samples, several validation studies of the FCQ using principal components analyses (PCA) have shown a one-factor solution.
  
  
  OBJECTIVE
  The aim of the present study was firstly to examine the factor structure and the psychometric properties of the FCQ in a sample of 399 students and secondly to explore the reliability of the FCQ-24, a 24-item subscale extracted from the FCQ.
  
  
  METHODS
  PCA was done using several guidelines to select the number of factors.
  
  
  RESULTS
  PCA yielded one factor, and the values of the Cronbach alpha were 0.95 and 0.87 for FCQ and FCQ-24, respectively.
  
  
  CONCLUSIONS
  These results firstly suggested an unidimensionality underlying FCQ items in nonpsychiatric samples and secondly confirmed the satisfactory reliability and validity of the FCQ and its subscale. Psychometric properties of the rating scales must be confirmed in other nonpsychiatric samples.
  
  
  CONCLUSIONS
  As subjective symptoms allow to detect subjects prone to schizophrenia, it is important to use well-validated rating scales.
authors.affiliation: CNRS-UMR 8160 and University Department of Psychiatry, Pinel's Hospital, Amiens, France.
authors.forename: Valérie
authors.initials: V
authors.lastname: Yon
authors.forename: Gwenolé
authors.initials: G
authors.lastname: Loas
authors.forename: Jean-Louis
authors.initials: JL
authors.lastname: Monestes
mesh_terms: D000328:Adult; D005260:Female; D005602:France; D006801:Humans; D007802:Language; D008297:Male; D011581:Psychological Tests; D011594:Psychometrics; D012559:Schizophrenia / Q000175:diagnosis*; D013334:Students; D011795:Surveys and Questionnaires; D014177:Translations