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Validation of a software program for measuring fatigue-related changes in keystroke durations.
Kim JH; Johnson PW
Conf Proc IEEE Eng Med Biol Soc 2011 Aug; 2011:7397-7400
Intensive computer use has been associated with musculoskeletal disorders (MSDs). Although the underlying mechanisms are still not fully understood, muscle fatigue is thought to be a contributing factor. Previous studies have shown that keystroke durations are related to muscle twitch durations and may be used as a surrogate measure of muscle fatigue. Software tools have been developed to measure keystroke durations; however, the accuracy of these programs may be influenced by the computer and/or the operating system (OS). Keystrokes were collected from six subjects and analyzed to determine whether there were any differences in keystroke durations measured by an OS-dependant software program and keystrokes collected directly from the keyboard using a USB analyzer (gold standard). The results demonstrated that the OS-dependant software program underestimated keystroke durations by 3.8 ms (103.5 vs. 107.3 ms; p < 0.0001) but keystroke durations at the individual level were highly correlated between the two systems (R(2) = 0.997). Despite the small differences, the high correlation between systems indicated that the software program could be used to collect keystroke durations.
Humans; Men; Women; Physiology; Musculoskeletal-system-disorders; Musculoskeletal-system; Muscles; Fatigue; Computers; Cumulative-trauma-disorders; Biomechanics
Jeong Ho Kim, Department of Industrial and Systems Engineering, University of Washington, Seattle, WA 98195
Conference Proceedings of the IEEE Engineering in Medicine and Biology Society
University of Washington
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division