Resilience in psychology is the positive capacity of people to cope with stress and catastrophe. It also includes the ability to bounce back to homeostasis after a disruption. Thirdly,it can be used to indicate having an adaptive system that uses exposure to stress to provide resistance to future negative events. In this sense "resilience" corresponds to cumulative "protective factors" and is used in opposition to cumulative "risk factors". The phrase "risk and resilience"' in this area of study is quite common. Commonly used terms, which are closely related within psychology, are "resilience", "psychological resilience", "emotional resilience", "hardiness", "resourcefulness", and "mental toughness". This focus on individual capacity had evolved for a multilevel perspective. The focus in research also shifted from "protective factors" toward protective "processes"; trying to understand how different factors are involved.