Lecturer, Department of Special Education, California State University – Northridge
Adjunct Professor, National University, California
Director, Centre for Education Research Partnership, Rochester Institute of Technology, US
Professor, Department of Research, National Technical Institute for the Deaf, Rochester Institute of Technology
Deputy Director, ESRC Deafness, Cognition and Language Research Centre (DCAL), University College London
Professor, Department of Language & Communication Science, City University, London
Associate Professor, Child Development Division, Educational Psychology, University of Illinois
Initiative Co-Director, NSF-funded National Project " Visual Language and Visual Learning"
Director, ESRC Deafness, Cognition and Language Research Centre (DCAL), University College London
Vice Dean (Research), Division of Psychology & Language Sciences, University College London
香港中文大學(深圳)人文社科學院院長
香港中文大學語言獲得實驗室總監
香港中文大學語言學及現代語言系教授及系主任
香港中文大學醫學院耳鼻咽喉-頭頸外科學系言語治療科主管及助理教授
香港大學教育學院學習、發展及多元教育部副教授
香港大學教育學院英國語文教育部教授
香港大學教育學院副教授
香港中文大學兒童雙語研究中心總監
香港中文大學語言學及現代語言系教授