NIOSH offers advice on alternative VDT keyboards
March 1, 1998 2 minutes read
NIOSH offers advice on alternative VDT keyboards
No conclusive evidence’ on effectiveness, however
Musculoskeletal problems relating to video display terminal (VDT) use among hospital office personnel often lead to purchases of alternative keyboards, which are thought to help prevent those problems. But is that assumption true? And what criteria should be considered when selecting an alternative keyboard?
Alternative keyboards such as split, concave, convex, and tented designs, as well as those with adjustable slopes and built-in wrist rests can help keep wrists straight, avoiding postures that could cause musculoskeletal disorders. However, few studies have examined actual performance of alternative keyboards to evaluate whether they are more beneficial than conventional designs in preventing discomfort, fatigue, and strain.
"There is no conclusive evidence as to whether alternative keyboards can reduce the risk of musculoskeletal disorders such as carpal tunnel syndrome," says Linda Rosenstock, MD, MPH, director of the National Institute for Occupational Safety and Health (NIOSH).
She also cautions that a computer keyboard is only one element of the workplace to be considered in VDT users’ safety and health. All features of the work environment should be examined when assessing ways to prevent musculoskeletal problems.
Nevertheless, before purchasing alternative keyboards for workers, NIOSH recommends the following selection criteria:
• Determine if the keyboard is compatible with existing hardware and software.
• Assess how the keyboard will fit with the work station.
• Evaluate whether the keyboard will affect the user’s performance.
• Allow users to try different kinds of keyboards on a trial basis before selecting one.
• Remember that frustration may occur if productivity is affected while users are becoming accustomed to a new keyboard.
• Involve a specialist experienced in office ergonomics.
• Ensure that VDT operators are trained in correct use of a new alternative keyboard.
• Institute a comprehensive ergonomics program for all workers.1
[Editor’s note: To obtain a copy of the publication referenced below, call (800) 35-NIOSH. For more information on alternative keyboard research and other ergonomics research, call the same toll-free number or access the NIOSH World Wide Web site at http://www.cdc.gov/niosh.]
Reference
1. National Institute for Occupational Safety and Health. Alternative Keyboards. NIOSH (DHHS) Pub. No. 97-148. Washington, DC: NIOSH; 1997.
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