Dynamics of Public Perception and Confidence

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Author(s): Amy Wenxuan Ding (University of Illinois, USA)
Copyright: 2009
Pages: 18
Source title: Social Computing in Homeland Security: Disaster Promulgation and Response
Source Author(s)/Editor(s): Amy Wenxuan Ding (University of Illinois, USA)
DOI: 10.4018/978-1-60566-228-2.ch002

Keywords: Information Science Reference / IT Security and Ethics / Media & Communications / Social Networking

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Abstract

To guard against potential terrorist attacks and protect the public and infrastructure, the U.S. Department of Homeland Security (DHS) and related authorities usually issue threat warning advisories to the public when there is a potential threat (CRS, 2004; DHS, 2001; PPW, 2004). The warning advisory relies on a five-color system (see Figure 2.1) that represents levels of risk related to a potential terror attack. Each threat level has a corresponding list of recommended actions that the public should take to reduce the likelihood or impact of a potential attack. Therefore, when a warning advisory is issued, authorities hope the public will follow the advisories, which are listed on the DHS’s Citizen Guidance on the Homeland Security Advisory System Web page, and take the recommended actions (Citizen, 2001; Federal, 2001). For example, as of December 31, 2007, the country remained at an elevated risk (i.e., code yellow) for a terrorist attack.

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