Evacuation models and disaster psychology

In evacuation models of buildings, neighborhoods, areas, cities and countries important psychological parameters are not frequently used. In this paper the relevance of some important variables from disaster psychology will be discussed. Modeling psychological variables will enhance prediction of human behavior during evacuations.
John Leach’s Dynamic Disaster Model describes three phases and five stages: A Pre-impact phase (Threat Stage and Warning Stage), an Impact phase, and a Post-impact phase (Recoil Stage, Rescue Stage and Post-traumatic Stage). In each phase and stage specific human behavior has been supposed to be a psychological response to a disaster. These responses are remarkably consistent and transferable across kinds of disasters.
Evacuation happens during Pre-impact phase, Impact phase and Post-impact phase (Recoil Stage and, or Rescue Stage). People’s cognitive and emotional states and overt behavior will be very different across the phases. During the Pre-impact phase risk estimation is very low, so evacuation is not seen as an inevitable action. Heavy stress and denial of life-threatening events during the Impact phase will hinder effective evacuation. Inactivity, apathy and childlike dependency on other people during the Recoil Stage will restrain survivors from active evacuation.
Evacuation models will be more effective if phases and accompanying human behavior are taken into account.