Figure 3 shows that in the study physiological, psychological and behavioural symptoms are the indicators of exposure to occupational stress. Measures such as crime detection and prevention, enforcement of laws, investigation and taking law breakers to court are the indicators police officers work performance. The figure also shows that the interaction between the independent variable and the depended variable is moderated by location of the work station, social support programmes and public expectation. The effects of the moderator variables were minimised through sampling and randomisation. According to Best and Khan (2006), randomisation is a good method of minimising the effects of moderator variables as it ensures that any association between the dependent and independent variables is not attributed to chance.