External Service
- Associate Chair, ACM CHI conference 2010, 2011.
- Doctoral Consortium Chair, CHI 2009, Boston, USA. April 2009.
- Engineering Program Chair, CHI 2006, Montreal, Quebec, Canada. April 22-27, 2006.
- Member of International Federation of Information Processing (IFIP) Working Group 2.7/13.4, November 2002-present.
- Review Board, University of Texas Health Science Center, School of Health Information Science. Fall 2002.
- Soldier Systems Panel of the Army Research Laboratories Technical Assessment Board, 2002-2006.
- Review Panel National Cancer Institute, Evidence-based Website Design Guidelines. 2001-2002
- Review Panel, AMBR Project Phase 3, US Air Force. 2001-2002.
- Board of Advisors, Office of Naval Research, Program in User-Centered Direct Interaction and Interactive Visualization, June 2000.
- Member of the Committee on Human Factors, National Research Council. Feb 1997-Jan 2005.
- Member of the Panel on Human Behavior Representation for Military Simulations, National Research Council. Summer 1997-Summer 1998.
- Editorial board of ACM Transactions on Computer-Human Interaction. (1993-1999)
- Technical Program Committee member for the ACM Human Factors in Computing Systems (CHI) conferences, 1989, 1990, 1991, 1992, 1993, 1994 (associate chair), 1995, 1996 (associate chair), 1997, 1999 (associate chair), 2000, 2004 (associate chair).
- Technical Program Committee member for the International Conference on User Modeling (June 20-24, 1999, Banff, Canada).
- Reviewer for the ACM Conference on User Interface Software & Technology 1994, 1995.
- Reviewer for the Cognitive Science Society Annual Meeting, 2002.
- Reviewer for refereed journals: Human Computer Interaction, ACM Transactions on Information Systems, ACM Transactions on Computer-Human Interaction, Behaviour and Information Technology, Cognitive Psychology, Memory & Cognition, International Journal of Human-Computer Interaction, Behavioral Research Merthods
- Reviewer for research proposals: National Science Foundation, Air Force Office of Scientific Research.
- Steering committee NSF Interactive Systems Grantees Workshop, Boston, November 11-12, 1995.
- Consultant to the National Academy of Science Committee on Virtual Reality Research and Development, August 1993.
- Invited participant in the ISAT Summer Study for DARPA entitled "Intelligent Interfaces", Spring & Summer 1991.
- Invited participant in the NSF workshop entitled "An Agenda for Human-Computer Interaction: User Interface Development Processes and Methodologies", March 1991.
- Invited participant in the Workshop on Future Metrics and Models for Assessment of Human/System Performance in Advanced Military Systems. Sponsored by Crew System Ergonomics Information Analysis Center, AAMRL/HE/CSERIAC Wright-Patterson AFB. 23 July - 26 July 1989.
