Causes of stress on the job 3.0 Effects of stress 4.0 Managing Stress in the Workplace 5.0 Conclusion Stress and Organisational Behaviour 1.0 Introduction Stress is a mental, physical and emotional reaction that result from demands in ones life exceeding personal and social resources and which when experienced cause physical and emotional tension. Stress affects ones emotions, though process, behaviors and ones physical conditions. At the work place the effect of stress cannot be underestimated. Stress leads to increased absenteeism, increased medical bills, poor performance and low production. According to a report by Karasek and Theorell, the collective cost of stress in the 1980s was estimated at$150 billion, while stress related absenteeism was 10 times higher than other related causes of absenteeism in U.K. (Cartwright and Cooper 1997). It is therefore important for organizations to reduce the effects of stress in the work place. This essay will discuss how negative stress affects organizational behavior.