Xiaofei Lu is the George C. and Jane G. Greer Professor of Applied Linguistics and Asian Studies at The Pennsylvania State University. His research has long centered on computational and quantitative analyses of linguistic complexity in reading materials, second language production, and academic writing. His current work explores mappings between linguistic forms and rhetorical/pragmatic functions in language production and sense-aware measurements of linguistic complexity that account for the specific meanings of polysemous linguistic forms in context. He has published over 90 peer-reviewed articles in leading journals, including Applied Linguistics, Behavior Research Methods, Computer Assisted Language Learning, Language Learning, Studies in Second Language Acquisition, TESOL Quarterly, and The Modern Language Journal. He received the 2023 Ken Hyland Best Paper Award from the Journal of English for Academic Purposes. His latest book, Corpus Linguistics and Second Language Acquisition: Perspective, Issues, and Findings, was published by Routledge in 2023.