Biomechanical Expert Witness
Verum Biomechanics provides biomechanical expert witness consulting services using biomechanics to investigate slips, trips and fall analyses, human factors, premises liability, walkway safety, friction of the floor, motor vehicular accidents, injury mechanics, motor and pedestrian reconstruction, code compliance (ASTM, OSHA, ADA as it pertains to walkway safety), and others.
Areas of Expertise
Tribometer Slip Resistance Testing, Motor Vehicular and Pedestrian Reconstruction.
Dr. Jonathan S. Lee-Confer has a PhD from the University of Southern California from a top 5 ranked program. Dr. Lee-Confer is currently a faculty member, the secretary general and co-chairman of the education committee for the Arizona Falls Prevention Coalition, and director of biomechanics for a forensic biomechanical consulting firm. Dr. Lee-Confer has published research in top journals such as "Journal of Biomechanics", "Applied Ergonomics", and "Journal of Testing and Evaluation". Furthermore, Dr. Lee-Confer is co-developing the biomechanical training for Arizona Senate Bill 1373 and is a co-author on the research behind the ASTM International F2508 standard.
Jonathan S. Lee-Confer, Ph.D. in the Social NetworksTwitter LinkedIn
Dr. Lee-Confer has been in the field of biomechanics for over a decade. Currently Dr. Lee-Confer is the Director of Biomechanics for Verum Biomechanics, a teaching faculty member at a college, and holds leadership positions at the Arizona Falls Prevention Coalition. Dr. Lee-Confer has taught biomechanics at the undergraduate and doctoral levels at California State University, Sacramento and the University of Southern California, respectively. Dr. Lee-Confer has worked on biomechanical projects for other forensic firms and conducted consulting work previously as well.
American Society of Testing and Materials
ASTM Subcommittee member F13 Pedestrian/Walkway Safety & Footwear
Arizona Falls Prevention Coalition
American Society of Biomechanics
Seminars & Training
Lee-Confer, J. What does the science say about slips? Tucson Defense Bar, Tucson, Arizona, United States of America
Lee-Confer, J. The Biomechanics of Gait, Slips and Falls. Columbia University, New York City, New York, United States of America
Lee-Confer, J. The Utility of the Arms for Balance During a Slip Perturbation. Arizona Falls Prevention Coalition, Arizona, United States of America
Lee-Confer, J. The Neural Control of the Arms During a Slip Perturbation. Teikyo University, Tokyo, Japan
Lee-Confer, J.S., Finley, J.M., Kulig, K., & Powers, C.M. (2022) Reactive Responses of the Arms Increase the Margins of Stability and Decrease Center of Mass Dynamics During a Slip Perturbation. Journal of Biomechanics. (Submitted 10/2022)
Lee-Confer, J. S., Kulig, K., & Powers, C. M. (2022). Constraining the Arms During a Slip Perturbation Results in a Higher Fall Frequency in Young Adults. Human Movement Science, 86, 103016
Lim, S., Luo, Y., Lee-Confer, J., & D'Souza, C. (2022). Obstacle Clearance Performance in Individuals with High Body Mass Index. Applied Ergonomics, 106, 103879
Lee-Confer, J. S., Bradley, N. S., & Powers, C. M. (2022). Quantification of Reactive Arm Responses to a Slip Perturbation. Journal of Biomechanics, 110967.
Lee-Confer, J., Kulig, K., Lo, M., & Powers, C. (2022) Arm Movements Reduce Center of Mass Excursion During a Slip Perturbation. North American Congress on Biomechanics, Ottawa, Canada.
Lee-Confer, J., Lee, R., Powers, C. (2022) Frontal Plane Trunk Motion is Induced During a Slip Incident. World Congress of Biomechanics, Taipei, Taiwan.
Lee-Confer, J., Lee, R., Powers, C. (2022) Arm Motion Decreases Whole-Body Angular Momentum in the Frontal Plane During a Slip Perturbation. World Congress of Biomechanics, Taipei, Taiwan.
Blanchette, M. G., Lee-Confer, J., Brault, J. R., Rutledge, B., Elkin, B. S., & Siegmund, G. P. (2021). Human Slip Assessment of Candidate Reference Surfaces for Walkway Tribometer Validation: An Update to Standard ASTM F2508. Journal of Testing and Evaluation, 50(2).
Lee, J., Asplund, C., Vera, L., Ruegg, S., & Powers, C. (2019) Quantification of Arm Kinematics in Response to a Slip-Induced Perturbation. International Society of Biomechanics, American Society of Biomechanics, Calgary, Canada.
Lee, J., Scher, I., Stepan, L., & Powers, C. (2019) The Effect of Ski Boots on Utilized Coefficient of Friction. International Congress on Snow Sports Trauma and Safety, Squaw Valley, CA, United States of America.
Lee, J., Asplund, C., Ruegg, S., Vera, L., & Powers, C. (2019) Are corrective muscle responses during a slip perturbation coordinated by the vestibular system? Neural Control of Movement Society, Toyama, Japan.
Lee, J., Dang, K., Asplund, C., & Powers, C. (2018) Arm Movements Increase Margins of Stability During a Slip Perturbation. USC Jacqueline Perry Research Day. Los Angeles, CA, United States of America.
Lee, J., Dang, K., Cohen, A., & Powers, C. (2017) A comparison of two methods to assess EMG latencies following a slip perturbation. European Society of Biomechanics, Seville, Spain.
Lee, J., Dang, K., & Powers, C. (2017) Heel acceleration differentiates fallers from non-fallers following a slip perturbation. European Society of Biomechanics, Seville, Spain.
Lee, J., Imamura, R., Merrier, N., & Shimada, S. (2015) Control of balance during quiet standing in an individual with FXTAS. Biomedical Engineering Society Conference. Tampa, FL, United States of America.
Lee, J., Imamura, R., Merrier, N., & Shimada, S. (2014) Fragile X-associated Tremor/Ataxia Syndrome. Biomedical Engineering Society Conference. San Antonio, TX, United States of America.
Ph.D., Biokinesiology (Emphasis in Biomechanics), University of Southern California
M.S., Kinesiology, California State University, Sacramento
B.S., Kinesiology, California State University, Sacramento