J.P. de Ruiter is the Bridge Professor in the Cognitive Sciences at Tufts University (Medford, Massachusetts), with an double appointment at the departments of Computer Science and Psychology. His primary work is on human gesture, conversational turn-taking, multimodal communication, experimental pragmatics, and miscommunication. He has published in linguistic, psycholinguistic, methodological, neurocognitive, and cognitive-psychological journals. His scientific interests include philosophy of science, artificial intelligence, and inferential statistics.  

Chris Bail is Professor of Sociology, Political Science, and Public Policy at Duke University, where he founded the Polarization Lab. He studies political tribalism, extremism, and social psychology using  data from social media and tools from the emerging field of computational social science.