The Effect of Blood Type on Social Loafing by Mediation DISC Personality Type (Case of Study: Staff of Shuttle Company in Tehran)

Group works are benefit for persons and organization and if done correctly, it will help to organization progress. But sometimes some problems reduce the productivity of teams. One of them is social loafing which means reducing the efficiency of persons in group works relative to individual works. Understanding the affecting factors on social loafing is effective in reducing the negative effects of this phenomenon. so, this study investigates the effect of blood type on social loafing with mediating of personality type of DISC. The target population are 750 employees of the shuttle company who 256 of them were selected based on Krejcie and Morgan table. In terms of purpose, this study is applied and is quantitative and the collection of data is descriptive-survey method. Data were collected by a questionnaire and for data analyze we used SPSS software. The results showed that blood type had a significant effect on social loafing. The effect of DISC personality type on social loafing and also the effect of blood type on social loafing by mediating of DISC personality type were confirmed, but blood type didnt have any significant effect on DISC personality type. It can be concluded that blood type of individuals has a significant effect on social loafing and the incidence of social loafing is higher among people with blood types A than other blood groups.