Pearson correlation is used according to both interval scale variables. Null hypothesis indicates independence between two variables and the alternative hypothesis shows a relationship between two variables under consideration. Results are shown in Table 3.

There is a direct correlation between age and stigma among professors, 0.514, also there is a direct correlation between age and dangerousness among professors 0.648, but the relationship was not found for students and staff.

Table 4: Stigma, dangerousness and measurement of social distance in eight disciplines