The development and application of psychophysical methods in upper-extremity work tasks and task elements

摘要: Abstract This paper examines an approach to modeling the relationship between perceived acceptable work exposures and physical stressors in upper-extremity tasks using psychophysical methods. Several years of laboratory-based studies results from a variety simulated task elements are summarized. The original impetus these was founded pioneering successful application methods applied manual materials handling (e.g., lifting) generally beginning 1960s 1970s. provided unique feasible solutions design problems involving exposure hazard cumulative trauma. Presently, were adapted studying common elements. Results provide conclusive evidence impact required posture, force, gender other variables on frequency. These method general, may be particularly helpful establishing realistic reasonable guidelines when workers exposed multiple, simultaneous hazards such as frequency, with deviated etc, absence well-defined biomechanical or physiological-based models. Finally, review theory which can wide range occupational activities is provided. Relevance industry Psychophysical have been utilized for jobs risk musculoskeletal disorders, low back. summarizes developed tasks. Required frequencies should reduced postural deviation, factors vibration, greater than nominal.