Michael H. Long is Professor of Second Language Acquisition in the School of Languages, Literatures, and Cultures at the University of Maryland. Recent publications include The Handbook of Second Language Acquisition, co-edited with Catherine Doughty (Wiley-Blackwell, 2003), Second Language Needs Analysis (2005), and Problems in Second Language Acquisition (2007).

Catherine J. Doughty is Senior Research Scientist and Second Language Acquisition Area Director at the Center for the Advanced Study of Language at the University of Maryland, and is an affiliate Professor of Second Language Acquisition at the University of Maryland. She is co-editor (with Michael Long) of The Handbook of Second Language Acquisition (Wiley-Blackwell, 2003).