https://en.wikipedia.org/wiki/Normalcy_bias Normalcy bias, or normality bias, is a cognitive bias which leads people to disbelieve or minimize threat warnings.[1] Consequently, individuals underestimate the likelihood of a disaster, when it might affect them, and its potential adverse effects.[2] The normalcy bias causes many people to not adequately prepare for natural disasters, market crashes, and calamities caused by human error. About 70% of people reportedly display normalcy bias during a disaster.[3] The normalcy bias can manifest in response to warnings about disasters and actual catastrophes. Such disasters include market crashes, motor vehicle accidents, natural disasters like a tsunami, and war. Normalcy bias has also been called analysis paralysis, the ostrich effect,[4] and by first responders, the negative panic.[5] The opposite of normalcy bias is overreaction, or worst-case scenario bias,[6][7] in which small deviations from normality are dealt with as signals of an impending catastrophe.