The normalcy bias can manifest in response to warnings about disasters and actual catastrophes. Such events can range in scale from incidents such as traffic collisions to global catastrophic risk. The event may involve social constructionism phenomena such as loss of money in market crashes, or direct threats to continuity of life: as in natural disasters like a tsunami or violence in war.
Normalcy bias has also been called analysis paralysis, the ostrich effect, and by first responders, the negative panic. The opposite of normalcy bias is overreaction, or worst-case scenario bias, in which small deviations from normality are dealt with as signals of an impending catastrophe.
Phases
Amanda Ripley, author of The Unthinkable: Who Survives When Disaster Strikes – and Why, identifies common response patterns of people in disasters and explains that there are three phases of response: "denial, deliberation, and the decisive moment". With regard to the first phase, described as "denial", Ripley found that people were likely to deny that a disaster was happening. It takes time for the brain to process information and recognize that a disaster is a threat. In the "deliberation" phase, people have to decide what to do. If a person does not have a plan in place, this causes a serious problem because the effects of life-threatening stress on the body (e.g. tunnel vision, audio exclusion, time dilations, out-of-body experiences, or reduced motor skills) limit an individual's ability to perceive information and make plans. Ripley asserts that in the third and final phase, described as the "decisive moment", a person must act quickly and decisively. Failure to do so can result in injury or death. She explains that the faster someone can get through the denial and deliberation phases, the quicker they will reach the decisive moment and begin to take action.
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