Nick C. Ellis is Professor of Psychology and Linguistics and a Research Scientist in the English Language Institute at University of Michigan. His research interests include usage-based and cognitive linguistic approaches to second language acquisition, emergentism, and dynamic systems and complex systems approaches to language. His influence has been particularly prominent in advocating usage-based accounts of language acquisition and in explaining explicit and implicit learning/knowledge and their interface. He is the recipient of the Distinguished Scholarship and Service Award of 2019 American Association for Applied Linguistics.