Presenting a systematic planning approach to risk communication, this work aims to show how to improve communication processes in the management of technological, environmental, and natural risks. The systematic planning approach focuses on research activities which are considered to be diagnostic tools providing insight into the public's reactions to risks and into the public's cognitive abilities to process risk information. These studies aim to provide the ingredients for an adequate risk communication from the audience side of the risk communication process. Evaluation studies are considered necessary to monitor the effectiveness of the communication. The book provides a review of current research in risk communication, focusing on perceived trust and credibility of risk communication sources, and arguments in risk messages, risk comparison, and framing of risk. Special attention is paid to the mass media context of risks and its impact on public perception. Finally, the potential of the new interactive media for risk communication is reviewed. The authors have performed several communication studies in the risk area, working from their social psychological background. This results in a monograph which should be interesting to those working on risk communication issues on an academic level, but the systematic planning approach is also a useful frame of reference for risk communication practitioners, or for those who are just interested in the often complex risk communication issues.