| Experience | Years |
|---|
| Professor Emeritus, University of Alberta, Edmonton, Alberta, Canada | 2009-Current |
| Attorney, W. A. Harrell, Attorney at Law | 1995-Current |
| I have been in private practice in California for more than 13 years. |
| President, Harrell & Associates, Ltd. | 1991-Current |
| Harrell & Associates, Ltd. provides expert witness services, jury selection and persuasion consulting, human factors consulting, and statistical consulting. |
| Full Professor, University of Alberta, Edmonton, Alberta, Canada | 1971-2009 |
| I was a professor of human factors engineering, experimental social psychology and statistics for 38 years. |