No Laughing Matter: Exploring the Effects of Scientists’ Humor Use on Twitter and the Moderating Role of Superiority

This study explores the effects of two humor styles?pure humor and satire?on audiences? Twitter engagement intentions as well as their attitudes toward mRNA Covid-19 vaccines. In an online between-subjects experiment (N = 484), these styles were embedded within a scientist?s tweet about the vaccines. The results showed that, compared to a no humor tweet, both pure humor and satire increased audience?s expectancy violation, subsequently decreasing both outcomes. Superiority as an individual trait also moderated the relationship between humor styles and both expectancy violation and Twitter engagement. These findings broaden our understanding of different humor styles in science communication on Twitter.

Identifying airborne transmission as the dominant route for the spread of COVID-19.

Various mitigation measures have been implemented to fight the coronavirus disease 2019 (COVID-19) pandemic, including widely adopted social distancing and mandated face covering. However, assessing the effectiveness of those intervention practices hinges on the understanding of virus transmission, which remains uncertain. Here we show that airborne transmission is highly virulent and represents the dominant route to spread the disease. By analyzing the trend and mitigation measures in Wuhan, China, Italy, and New York City, from January 23 to May 9, 2020, we illustrate that the impacts of mitigation measures are discernable from the trends of the pandemic. Our analysis reveals that the difference with and without mandated face covering represents the determinant in shaping the pandemic trends in the three epicenters. This protective measure alone significantly reduced the number of infections, that is, by over 78,000 in Italy from April 6 to May 9 and over 66,000 in New York City from April 17 to May 9. Other mitigation measures, such as social distancing implemented in the United States, are insufficient by themselves in protecting the public. We conclude that wearing of face masks in public corresponds to the most effective means to prevent interhuman transmission, and this inexpensive practice, in conjunction with simultaneous social distancing, quarantine, and contact tracing, represents the most likely fighting opportunity to stop the COVID-19 pandemic. Our work also highlights the fact that sound science is essential in decision-making for the current and future public health pandemics.