Repetive movements, static and ackward postures during computer-human interactions are known risk factors for musculoskeletal disorders. As newer computer interfaces such touchscreen, virtual and augmented reality (VR/AR) have been introduced and become more prevelent, the computer-human interaction patterns are now different from those seen in old days with conventional computer input devices. By evaluating various biomechanical exposures and usability, we explore opportunities to optimize and/or improve the computer-human interaction with hope that we can reduce computer-related musculoskeletal disorders. Past and current research has been funded by NIOSH, HP, Steelcase, and OERC.
"Evaluation of Biomechanical Exposures in the Neck and Upper Extremities During Augmented Reality Interactions" to provide industry and users design recommendations and hand gesture usage guidelines.
Kia K, Sisley J, Johnson PW, Kim JH. 2019. Differences in typing forces, muscle activity, wrist posture, typing performance, and self-reported comfort among conventional and ultra-low travel keyboards. Applied Ergonomics, vol. 74, pp. 10-16.
Armrests and back support reduced biomechanical loading in the neck and upper extremities during mobile phone use, Applied Ergonomics, vol. 73, pp. 48 - 54.. 2018.
Kim JH, Aulck L, Bartha MC, Harper CA, Johnson PW. 2014. Differences in typing forces, muscle activity, comfort, and typing performance among virtual, notebook, and desktop keyboards. Applied ergonomics. 45(6):1406-13.
Kim JH, Johnson PW. 2014. Fatigue development in the finger flexor muscle differs between keyboard and mouse use. European journal of applied physiology. 114(12):2469-82.
Kim JH, Aulck L, Thamsuwan O, Bartha MC, Johnson PW. 2014. The Effect of Key Size of Touch Screen Virtual Keyboards on Productivity, Usability, and Typing Biomechanics. Human Factors: The Journal of the Human Factors and Ergonomics Society. 56(7):1235-1248.