Health psychology- concerned with the causes, treatment and prevention of illness. Stress- a disruption in psychological and physiological functioning that occurs when an event is perceived as a threat to our goals and when we cannot cope with the stressor. Major types of stress: frustration- occurs when the pursuit of some goal is blocked, conflict, pressure, to perform, to conform, life changes- any changes in our living circumstances that require readjustment, whether these changes are positive or negative. Social readjustment rating scale helps identify people who are at risk for stress related problems. It continues a list of major life events that require change. 300 or more- 80% chance of developing illness. It seems as though frequent and minor hassles are better predictors of immediate day-to-day emotional and physical health than major life events. On the other hand, major life events produce changes in health 1 or 2 years after the event.