Joel Cooper (IMAGE) Princeton University Caption Joel Cooper, a professor of psychology at Princeton University, is the senior author on a compelling new study that reveals how to get people from vaguely supporting public health choices -- including mask wearing, social distancing and vaccinations -- to taking concrete steps to implement them. Credit Photo by Sameer A. Khan/Fotobuddy Usage Restrictions Editorial use only License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.