Dr. Christina Zarcadoolas is a sociolinguist and internationally recognized expert in health literacy and public understanding of health and science. Her research focuses on analyzing and closing the gaps between expert knowledge and public understanding. Her critically acclaimed book, Advancing Health Literacy: A Framework for Understanding and Action, (co-authored with Andrew Pleasant, PhD., and Dr. David S. Greer, Jossey-Bass/Wiley 2006) was reviewed by New England Journal of Medicine referred, which called it "required reading" for public health professionals responsible for developing new tools for communicating with patients and the general public.