1. Ph.D. Student, Lyles School of Civil Engineering, Purdue Univ., West Lafayette, IN.
2. Research Technician, Dept. of Psychological Sciences, Purdue Univ., West Lafayette, IN.
3. Associate Professor, Dept. of Psychological Sciences, Purdue Univ., West Lafayette, IN.
4. Associate Professor, School of Industrial Engineering and Civil Engineering, Purdue Univ., West Lafayette, IN.
5. Associate Professor, Dept. of Computer Science, George Mason Univ., Fairfax, VA.