title: [The UNIPSICO questionnaire: psychometric properties of the scales measuring psychosocial demands].
abstract: OBJECTIVE
  To analyze the psychometric properties of the UNIPSICO questionnaire' scales designed to evaluate psychosocial demands at work.
  
  
  METHODS
  The sample consisted of 2564 participants; 1391 were employees working with persons with intellectual disabilities and 1173 high school teachers from the Valencian Community. Data were collected using the UNIPSICO questionnaire, which features scales designed to measures psychosocial demands at work. This instrument contains 27 items distributed in 5 scales: interpersonal conflicts, imbalance, role conflict, role ambiguity, and workload. Data were analysed to test item validity, construct validity by confirmatory factor analysis (CFA), reliability by Cronbach's alpha, and predictive validity by stepwise regression analysis.
  
  
  RESULTS
  For all items, skewness and reliability were adequate. The five scales followed a normal distribution, with skewness values ranging between +1 and -1. The results of the CFA confirmed the hypothesised five-factor structure. The hypothesised model obtained a good data fit (GFI = 0,935, NNFI = 0,903, CFI = 0,914, RMSEA = 0,050). Scale score reliability coefficients for the five scales showed values above 0.70. Stepwise regression analysis demonstrated all variables to be significant predictors of psychosomatic disorders.
  
  
  CONCLUSIONS
  The validity and reliability of the five scales were satisfactory. In addition, the scales offer predictive validity for measuring work-related psychosomatic disorders. The UNIPSICO scales analyzed are an adequate tool for the evaluation of psychosocial risk factors at work.
authors.affiliation: Unidad de Investigación Psicosocial de la Conducta Organizacional (UNIPSICO), Universitat de València, València, Spain. pedro.gil-monte@uv.es.
authors.forename: Pedro R
authors.initials: PR
authors.lastname: Gil-Monte