Life changes, no matter if they are positive or negative, are always a source of stress. To what extent have life changes been shown to be a source of stress?

Stress – an unpleasant state of emotional and physiological arousal that people experience in situations that they perceive as dangerous or threatening to their well-being. The word stress means different things to different people. Some people define stress as events or situations that cause them to feel tension, pressure, or negative emotions such as anxiety and anger. Others view stress as the response to these situations. This response includes physiological changessuch as increased heart rate and muscle tensionas well as emotional and behavioural changes. However, most psychologists regard stress as a process involving a persons interpretation and response to a threatening event.code…(short extract)