Academic or Professional Positions.
- Professor. Texas Tech University, February 2000 - present.
- Visiting Senior Research Scientist. University of California, Los Angeles,
September 1999 - August 2000.
- Associate Professor. Texas Tech University, August 1996 - February 2000.
- Assistant Professor. Texas Tech University, August 1990 - August 1996.
- Visiting Assistant Professor. Texas Tech University, June 1989 - August 1990.
- Assistant Professor. St. Petersburg Pedagogical Institute, St. Petersburg, Russia, 1982 - 1988.