Introduction Alongside qualitative and quantitative methodologies in research, the trend of combining qualitative and quantitative methodologies is widely used and increasingly articulated, attached to practice of research and recognized as the third major research. research approach or paradigm (Johnson, Onwuegbuzie & Turner, 2007). The beginning of combined methods was argued on the idea that different methodologies have always coexisted comfortably (Datta, 1994). On the other hand, Greene (2007) argues that another perspective on the development of the combination of quantitative and qualitative methods has emerged due to the willing acceptance of the mixture of methodologies in the applied social sciences, evaluators and researchers who are always confronted with complex and multiplex social problems. phenomena that are not easily acceptable for single-image probing. Greene (2008) further asserted that the disorder of complexity requires multiple tools of investigation. Therefore, it is not unusual that studies in occupational psychology are accustomed to combining qualitative and quantitative methods to better strengthen the results of any subject (Moran-Ellis, Alexander, Cronin, Dickinson, Fielding, Sleney and Thomas, 2006). .According to Johnson et al. (2007), the term combined methods or mixed methods research has gained dominance over alternatives such as integrative research and mixed research. The term mixed methods suggests that it is the methodologies and not the methods that are mixed. Johnson et al. (2007) provide an overview of the definition of mixed methods: “Mixed methods research is the type of research in which a researcher or team of researchers combines elements of qualitative and quantitative research approaches (e.g., use of ...... middle of article .....integration and publications as indicators of "performance" from the Journal of Mixed Methods Research, 1,147-63. D. (1999) Qualitative Research Methods: An Orientation to Health SouthMelbourne, Australia: Oxford University Press. Sandelowski, M. (2000). in Mixed Methods Studies, Research in Nursingand Health, 23, 246-255. Stange, KC (2006). Ann Fam Med, 4Stern, P. (1992). ), Grounded Theory 1984 -1994 (Vol. 1, pp. 53-63 CA: Sociology PressTeddlie, C. and Tashakkori, A. Foundations of mixed methods research: integrating quantitative and qualitative approaches in the social sciences). and Behavioral, Los Angeles: Sage, 2009, p. 133.