B.S.     1974                The Pennsylvania State University:  Geophysics
M.A.    1977                The University of Texas at Arlington:  Linguistics
M.A.    1982                University of Southern California:  Linguistics
Ph.D.   1984                University of Southern California:  Linguistics
Ph.D.   2000                Honorary degree; University of Uppsala, Sweden


Professional Experience

1990-present               Regents' Professor, Applied Linguistics Program,
English Department, Northern Arizona University (Regents' Professor since 2000)

1984-1990                   Assistant Professor
Department of Linguistics, University of Southern California
(joint appointment with Speech Science and Technology from 1984-1986)

1983-1984                   Programmer/Consultant
Academic Computing Services, University of Southern California

1981-1983                   Assistant Lecturer
Freshman Writing Program, U.S.C.

1978-1980                   Project Coordinator
Somali Literacy Project


Short-term Teaching and Research Appointments

November 2012          Visiting Professor, Langnet Program,
University of Tampere, Finland

Nov-Dec 2010             Visiting Professor, Linguistics Department
King Mongkut's University of Technology Thonburi (KMUTT), Bangkok, Thailand

April-May 2009          Ian Gordon Fellow
Victoria University Wellington, New Zealand

Nov-Dec 2008            Research Fellow, FRIAS
(Freiburg Institute for Advanced Studies) University of Freiburg, Germany

April 2008                   Visiting Professor, Graduate School
University of Copenhagen, Denmark

Spring 2004                 Distinguished Lecturer, School of Education
Temple University Japan, Tokyo and Osaka

Winter 2004                Visiting Professor, Linguistics Department
Universidad Católica de Valparaíso, Chile

Fall 2003                     Guest Researcher, Research Centre on Multilingualism
University of Hamburg, Germany

Summer 2003             Visiting Professor, Linguistic Society of America
Michigan State University

Summer 2000             Visiting Professor, English Department
University of Zurich, Switzerland

Winter 2000                Visiting Professor, Langnet Program,
University of Helsinki, Finland

Spring 1997                 Visiting Professor, English Department,
University of Uppsala, Sweden

Fall 1996                     Guest Researcher
Centre for Advanced Study
Norwegian Academy of Arts and Sciences, Oslo, Norway

Spr./Sum. 1993           Visiting Professor (Guest Researcher)
Computing Centre for the Humanities
University of Bergen, Norway

Spring 1990                 Visiting Professor
English Department
University of Stockholm, Sweden