This research is to study the psychometric features of Minnesota job satisfaction questionnaire (MSQ) on the staff of manufacturing companies in Tehran and its suburbs who worked on the years 1392 & 1393

This research is to study the psychometric features of Minnesota job satisfaction questionnaire (MSQ) on the staff of manufacturing companies in Tehran and its suburbs who worked on the years 1392 & 1393. To this end, a number of 403 men and women individuals from the staff of these companies were selected through multistage random sampling. The entire participants were tested and evaluated using the long form (100 questions) of Minnesota job satisfaction questionnaire. This is an exploratory descriptive survey type of research in correlation directory studied based on the classic methods of psychometrics.  Using the Cronbach’s alpha coefficient, the validity values of internal consistency of internal and external factors of job satisfaction questionnaire were derived at 0.971 and 0.971 for 61 and 37 questions, respectively.  The validity coefficients for the entire questionnaire of Minnesota job satisfaction were calculated at 0.983 following the removal of two questions in the factor analysis (98 questions). Structural reliability of questionnaire was studied using factor analysis and the KMO indicator was equal to 0.935 while the significance of Bartlett’s sphericity indicated the presence of necessary conditions for application of factor analysis. Results of factor analysis through varimax rotation led to extraction of two factors that explains nearly 43% of the total variance. The first factor (internal factor) and the second factor (external factors) constitute 22.889% and 19.842%, respectively.  Ratings percentage was calculated in order to draft the norm for job satisfaction questionnaire and as a result, the table of norm was drawn up for both factors and the entire questionnaire.
Results of this research suggest that the Minnesota job satisfaction questionnaire may be used as a relatively valid and reliable means for measurement of occupational satisfaction in industrial units.