28 pages, This study investigates how the emotional tone of food safety risk communication messages predicts message virality on social media. Through a professional Internet content tracking service, we gathered news articles written about the 2018 romaine lettuce recall published online between October 30th and November 29th, 2018. We retrieved the number of times each article was shared on Twitter and Pinterest, and the number of engagements (shares, likes, and comments) for each article on Facebook and Reddit. We randomly selected 10% of the articles (n = 377) and characterized the emotional tone of each article using machine learning, including emotional characteristics such as discrete emotions, emotional valence, arousal, and dominance. Conveying negative valence, low arousal, and high dominance, as well as anger and sadness emotions were associated with greater virality of articles on social media. Implications of these findings for risk communication in the age of social media are discussed.
16 pages., via online journal., The 2018 report from the Intergovernmental Panel on Climate Change warns that Earth’s temperatures may soon reach a tipping point that threatens humanity’s future. Scientists from many disciplines agree that anthropogenic climate change is a serious problem yet many Americans remain skeptical of the existence, causes, and/or severity of climate change. In this article, we review recent research on climate change communication focusing on audience variables and messaging strategies with the goal of providing communication practitioners research-based recommendations for climate change message design. Factors that influence audience acceptance and understanding of climate science include: demographic variables (such as political party affiliation, religious orientation, and geographic location), as well as brief sections on misinformation, and beliefs in pseudoscience. Keys to effectively construct climate messaging are discussed including: framing strategies; reducing psychological distance; emotional appeals; efficacy cues; weight-of-evidence/ weight of expert reporting; inoculation/correcting misinformation; and separating science from conspiracy theories. Evidence-based strategies are critical in giving science communicators the tools they need to bridge the gap between the scientific community and the at-risk public.
