Validity assessment of self-reported construction tasks.
Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Grant Number R01-OH-03266, 1997 Mar; :1-35
An observational study was conducted among sheet metal workers to evaluate the validity of self reported exposures to construction work tasks. Subjects included 49 shop workers and 52 construction site sheet metal workers. Tasks were divided into major (1 hour or more) and minor (less than 1 hour). Workers were observed for about 25% of the work day, for 3 days. Subjects completed a questionnaire each day indicating tasks done, time spent on each, the size of materials for each task, and the number of times each power tool was used. Worker estimates were compared with observations. Sheet metal workers in the shop tended to specialize in particular tasks, while construction workers showed greater day to day variability. The authors conclude that workers tended to overestimate the amount of time spent at major tasks, and to underestimate the amount of time spent at shorter duration tasks. The primary sources of the errors for the workers were a definition of the tasks, and remembering how the day was spent. For the observer the primary sources of error were in the definition of the tasks, and sampling error from observing each worker for only about one quarter of the day.
NIOSH-Grant; Musculoskeletal-system-disorders; Data-processing; Ergonomics; Human-factors-engineering; Metalworking-industry; Construction-workers; Task-performance
Medicine George Washington University 2300 K St NW RM 201 Washington, DC 20037
Final Grant Report
NTIS Accession No.
National Institute for Occupational Safety and Health
George Washington University, Washington, Dist of Col