Public Perceptions of GMOs and Mandatory Labeling: William K. Hallman is a professor and Chair of the Department of Human Ecology at Rutgers University and former Director of Rutgers’ Food Policy Institute. An expert in risk perception and risk communication, he is a member of the graduate faculties of Psychology, Nutritional Sciences, and Planning and Public Policy. Abstract: Polling data has been used by all sides in the GMO debate, purporting to represent public sentiments about GMOs and to support positions on whether mandatory labeling is favored by the public. What does the public really think about GMOs, and do most Americans want mandatory GMO labeling? Our data collected before the 2013 elections shows that the answers to these queries depend a great deal on how you ask the questions.