The goal of risk communication is to inform people about the risks they face and to encourage them to take appropriate action in response to that threat. To achieve this goal, risk communication scholars continuously examine the messages surrounding crises and disasters, and engage in message-testing to evaluate theory-driven message designs. Recent communication scholarship recommends that messages should including instructing information (Coombs, 2012), and should take into consideration established pedagogy based on instructional communication research (Sellnow & Sellnow, 2010). This dissertation continues to build on research which applies instructional communication scholarship to risk communication messaging. Using message-testing, this dissertation examined the utility of the IDEA model a message design for earthquake early warnings.

The hepatitis A crisis in Kentucky is unprecedented compared to other states. With thousands of hospitalizations and over 60 deaths in the state of Kentucky alone, there is a need to evaluate the government’s response to the hepatitis A virus (HAV) epidemic. Therefore, the instructional risk communication messages that are being conveyed by the Kentucky Cabinet for Health and Family Services (KCHFS) are instrumental in the education and action plans of Kentuckians who are at risk of contracting HAV. This study utilizes the IDEA Model Thematic Analysis Codebook as a guide to analyze the KCHFS’ risk communication regarding the hepatitis A crisis, identifying the strengths and weaknesses of its campaign. Through this research, I identify the weaknesses in the KCHFS’ risk communication campaign including: the need to focus on a more general audience, the need to foreground all facets of the IDEA model on its website, the need to promote the vaccination of the HAV more strongly, and the need to make the website more user-friendly for all populations.