Plenary

Dr. Xun Yan is a professor of the Department of Linguistics at University of Illinois Urbana-Champaign. Dr. Yan broadly focuses on speaking and writing assessment, which includes scale development and validation, rater behavior and training, psycholinguistic approach to language testing, assessment literacy for language teachers, and test score use in educational settings. Dr. Yan's research employs a largely linguistic approach to examining characteristics of speaking and writing performances, to help better understand the construct of language proficiency, psychometric qualities of test scores, and validity and fairness evidence for language tests.