Event-Driven Changes in Homeland Security Risk Perception

Abstract This study examines how public perceptions of homeland security risks shift after major events. Using 2016 Amazon Mechanical Turk surveys, it assesses concern for ten hazards, including terrorism, natural hazards, and cyber threats. Data were analyzed using t -tests of both absolute and relative risk and of effects before and after events. Findings show that terrorist attacks like the Orlando shooting significantly heightened concern, while natural hazards had a lesser impact. Perceptions were shaped by recent events, personal experience, and geography. The research underscores the role of emotional and psychological factors in risk perception and highlights the need to integrate public concern into homeland security policies to strengthen societal resilience.