The first part of this module provides an overview of health risk behaviours at a population level including their prevalence and variations and the social and environmental factors that may be acting to influence them. In the second part of the module, students will learn about the major theories of health behaviour change. They will be able to identify various psychosocial factors that play a role in the behaviour change process. They will study various incentive, compliance and adherence techniques that can be utilised with different populations. Specific issues such as stress, obesity, addictive behaviours, and smoking cessation will be covered in this module.