H. Harvey Cohen, Ph.D., CPE, is president of Error Analysis, Inc., a human factors and safety research and consulting firm in San Diego, CA. He received his Ph.D. in human factors and ergonomics from North Carolina State University in 1972. He is a certified professional ergonomist (CPE) and is a founding member of the Board of Certification in Professional Ergonomics (BCPE). Before forming his own research and consulting firms in 1977, Dr. Cohen was a senior research scientist with the National Institute for Occupational Safety and Health (NIOSH) in Cincinnati, OH. Dr. Cohen has over thirty years of professional experience and has authored over 150 scientific research publications in the human factors and safety fields, including five books and book chapters. He has person-ally investigated over 5,000 injury incidents, has given over 1,250 depositions and has testified in U.S. courts on over 350 occasions, about equally for plaintiffs and defense, in over thirty states and territories. Dr. Cohen specializes in premises, products, workplace, recreational, pedestrian, and transportation injury cases, focusing on the causes and means for prevention of human or user error—most notably slips, trips, missteps and falls in all types of settings.