Millman, L.S. Merritt; Richardson, Daniel C. and Orgs, Guido. 2022. Continuous and collective measures of real-time audience engagement. In: Matthew Reason; Lynne Conner; Katya Johanson and Ben Walmsley, eds. Routledge Companion to Audiences and the Performing Arts. Abingdon: Routledge, pp. 293-307. ISBN 9780367470753 [Book Section]