The impact of effective factors on organizational citizenship behavior in Shiraz University of Medical Sciences'(SUMS) staff in 2010

Organizational Citizenship Behavior indicates an individual cautious behavior that although is not known by formal organizational reward system directly, can have a positive and effective role on the organizational performance and lead to functional improvement. In this study the relationship between Organizational Citizenship Behavior and its determinant factors has been surveyed. aterials & This is a cross- sectional study that was done on an accidental sample of 130 staff working in Shiraz University of Medical Sciences (SUMS). The required data was gathered by using a questionnaire and descriptive statistics and person regression test were applied in significant level of 0.05. Results showed that there were statistically positive significant differences between OCB and organizational culture, personality and internal control focus (p<0.001) in contrast with the reversed and significant differences between OCB and job stress (p<0.001).In addition there were statistically positive significant differences between various dimensions of OCB with each other (p<0.001). furthermore, between courtesy and organizational culture, control focus and personality, citizenship behavior and organizational culture, sacrifice with culture and personality and between conscience and culture, the statistically positive significant differences were observed in spite of the statistically negative significant differences between courtesy, citizenship behavior, conscience with job stress and also between conscience and personality(p<0.05). reducing job stress, existing organizational justice and the group oriented organizational culture and also staff` characteristics the same as personality, control focus, etc can have an effective role on the incidence rate of Organizational Citizenship Behavior shown by staff in Shiraz University of Medical Sciences. So attention to each of these dimensions and key factors and attempts for amplifying and supporting them by managers can develop these behaviors and lead to functional improvement in the organizations.