title: Psychometric properties of the Polish version of Karasek's Job Content Questionnaire.
abstract: OBJECTIVE
  The objective of this study was to test the psychometric properties of selected scales, namely, Decision Latitude, Psychological Job Demand, Social Support and Job Insecurity, from the Polish version of Karasek's 29-item Job Content Questionnaire (JCQ).
  
  
  METHODS
  The study covered 2626 workers from a wide range of occupations. Estimation of internal consistency with Cronbach's α, and both exploratory factor analysis (with principal axis method) and confirmatory factor analysis were the main statistical methods. Predictive validity was assessed by regressing the outcomes of JCQ scales on the outcomes of Goldberg and Williams's General Health Questionnaire.
  
  
  RESULTS
  The internal consistency of the scales was satisfactory, ranging from .60 to .85. The 4-dimensional structure of the measured version was generally confirmed; the 4 dimensions being Decision Latitude; Psychological Job Demands and Job Insecurity merged into 1 factor; Co-workers' Social Support; and Supervisors' Social Support. Fit indexes for this model were satisfactory, it was also proved that this model predicted mental health.
  
  
  CONCLUSIONS
  The Polish version of Karasek's 29-item JCQ has satisfactory psychometric properties; it is a short, easy method for assessing psychosocial work conditions.
authors.affiliation: Central Institute for Labour Protection - National Research Institute (CIOP-PIB), Poland. dozol@ciop.pl.
authors.forename: Dorota
authors.initials: D
authors.lastname: Zołnierczyk-Zreda
authors.affiliation: University of Social Sciences and Humanities, Poland.
authors.forename: Sylwia
authors.initials: S
authors.lastname: Bedyńska
mesh_terms: D000328:Adult; D000368:Aged; D003657:Decision Making; D004522:Educational Status; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009790:Occupations; D011044:Poland; D011594:Psychometrics; D015203:Reproducibility of Results; D012944:Social Support; D013315:Stress, Psychological / Q000453:epidemiology; D011795:Surveys and Questionnaires; D017132:Workplace / Q000523:psychology*