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The Split Keyboard: An Ergonomics Success Story

University of California, Berkeley, Berkeley, California, david.rempel{at}ucsf.edu

Objective: The author reviews the paper by Kroemer (1972) on the design of the split geometry keyboard and the subsequent 35 years of research on the topic. Background: It was first suggested in the 1920s that arm strain in the typist could be reduced by splitting the keyboard into two halves and inclining the two halves laterally. The first systematic research on the split keyboard was conducted by Kroemer in the 1960s and published in his 1972 article. Methods: The literature on split geometry keyboards was identified, and the progression of the research was reviewed. Results: The Kroemer article marked the beginning of a prolonged, worldwide research effort to determine whether and how the split keyboard design might improve comfort and prevent pain in keyboard users. Conclusions: In the early 1990s, split keyboard designs began to be broadly commercially available. Clear evidence of a health benefit of the split keyboards emerged in the late 1990s. By 2006, a split keyboard was the number one—selling keyboard, of all keyboards sold, in the U.S. retail market. Application: The history of research on this topic, the challenges to changing the conventional design, and the broader acceptance of the split design are a success story with lessons for all of us.

References

• Alden, D.G., Daniels, R.W., & Kanarick,A.F. (1972). Keyboard design and operation: A review of the major issues. Human Factors, 14, 275-293.
• ANSI/HFS-100. (1988). American national standard for human factors engineering of visual display terminal workstations. Santa Monica, CA: Human Factors Society.
• Arndt, R. (1984). Workbook for ergonomic considerations in office design. Alexandria, VA: National Office Products Association.
• Bergqvist, U., Wolgast, E., Nilsson, B., & Voss, M. (1995). Musculoskeletal disorders among visual display terminal workers: Individual, ergonomic, and work organizational factors. Ergonomics, 38, 763-776.[Medline] [Order article via Infotrieve]
• Bernard, B., Sauter, S., Fine, L., Petersen, M., & Hales, T. (1994). Job task and psychosocial risk factors for work-related musculoskeletal disorders among newspaper employees. Scandinavian Journal of Work and Environmental Health, 20, 417-426.
• Brewer, S., Van Erg, D., Amick, B.C., Irvin, E., Daum, K., Gerr, F., et al. (2006). Workplace interventions to prevent musculoskeletal and visual symptoms and disorders among computer users: A systematic review. Journal of Occupational Rehabilitation, 16, 317-350.[CrossRef]
• Cakir, A. (1995). Acceptance of the adjustable keyboard. Ergonomics, 38, 1728-1744.
• Cakir, A., Hart, D.J., & Stewart, T.F.M. (1980). Visual display terminals. Chichester, UK: Wiley.
• Chen, C., Burastero, S., Tittiranonda, P., Hollerbach, K., Shih, M., & Denhoy, R. (1994). Quantitative evaluation of four computer keyboards. In Proceedings of the Human Factors and Ergonomics Society 38th Annual Meeting (pp. 1094-1098). Santa Monica, CA: Human Factors and Ergonomics Society.
• Faucett, J., & Rempel, D. (1994). VDT-related musculoskeletal symptoms: Interactions between work posture and psychosocial work factors. American Journal of Industrial Medicine, 26, 597-612.[Medline] [Order article via Infotrieve]
• Ferguson, B., & Duncan, J. (1974). Keyboard design and operating posture. Ergonomics, 17, 731-744.[Medline] [Order article via Infotrieve]
• Gerard, M.J. (1994). An ergonomic evaluation of the Kinesis ergonomic computer keyboard. Ergonomics, 37, 1661-1668.
• Gerr, F., Marcus, M., Ensor, C., Kleinbaum, D., Cohen, S., Edwards, A., et al. (2002). A prospective study of computer users: I. Study design and incidence of musculoskeletal symptoms and disorders. American Journal of Industrial Medicine, 41, 222-235.
• Gerr, F., Monteilh, C.P., & Marcus, M. (2006). Keyboard use and musculoskeletal outcomes among computer users. Journal of Occupational Rehabilitation, 16, 265-277.[Medline] [Order article via Infotrieve]
• Grandjean, E., Nakaseko, M., Hunting, W., & Laubli, T. (1981). Ergonomische Untersuchungen zur Entwicklung einer neuen Tastatur für Bueromaschinen [Ergonomic experiments for the development of a new keyboard for office machines]. Zeitschrift Arbeitswissenschaft, 35, 221-226.
• Honan, M., Jacobson, J., Tal, R., & Rempel, D. (1996). Changes in wrist posture during a prolonged typing task. In Proceedings of the Human Factors and Ergonomics Society 40th Annual Meeting (pp. 629-631). Santa Monica, CA: Human Factors and Ergonomics Society.
• Honan, M., Serina, E., Tal, R., & Rempel, D. (1995). Wrist postures while typing on a standard and split keyboard. In Proceedings of the Human Factors and Ergonomics Society 39th Annual Meeting (pp. 366-368). Santa Monica, CA: Human Factors and Ergonomics Society.
• Ilg, R. (1987). Ergonomic keyboard design. Behavior and Information Technology, 6, 303-309.[CrossRef]
• International Standards Organization (ISO). ( 1971). ISO 2126 - Alphanumeric keyboard operated with both hands. Geneva, Switzerland: Author.
• Klockenberg, E.A. (1926). Rationalisierung der Schreibmaschine und ihrer Bedienung [Rationalization of the typewriter and its operation]. Berlin: Springer.
• Komoike, Y., & Horiguchi, S. (1971). Fatigue assessment on key punch operators, typists and others. Ergonomics, 14, 101-109.[Medline] [Order article via Infotrieve]
• Kroemer, K.H.E. (1972). Human engineering the keyboard. Human Factors, 14, 51-63.[Medline] [Order article via Infotrieve]
• Kroemer, K.H.E. (2001). Keyboards and keying: An annotated bibliography of the literature from 1879 to 1999. Universal Access in the Information Society, 1, 99-160.
• Lassen, C.F., Mikkelsen, S., Kryger, A.I., Brandt, L.P., Overgaard, E., Thomsen, J.F., et al. (2004). Elbow and wrist/hand symptoms among 6943 computer operators: A 1-year follow-up study (the NUDATA study). American Journal of Industrial Medicine, 46, 521-533.[CrossRef][Medline] [Order article via Infotrieve]
• Laubli, T., Nakaseko, M., & Hunting, W. (1980). Arbeitsbedingte cervicobrachiale Beschwerden bei Buroarbeiten [Cervicobrachial occupational diseases in office workers]. Sozial- und Preventivmedizin, 25, 407-412.[CrossRef]
• Marek, T., Noworol, C., Wos, H., Karwowski, W., & Hamiga, K. (1992). Muscular loading and subjective ratings of muscular tension by novices when typing with standard and split-design keyboards. International Journal of Human-Computer Interaction, 4, 387-394.
• Marklin, R.W., & Simoneau, G.C. (2001). Effect of setup configurations of split computer keyboards on wrist angles. Physical Therapy, 81, 1038-1048.[Abstract/Free Full Text]
• Marklin, R., & Simoneau, G. (2004). Design features of alternative computer keyboards: A review of experimental data. Journal of Orthopaedic & Sports Physical Therapy, 34, 638-649.[CrossRef]
• Marklin, R.W., Simoneau, G.G., & Monroe, J.F. (1999). Wrist and forearm posture from typing on split and vertically inclined keyboards. Human Factors, 41, 559-569.[Abstract/Free Full Text]
• McPhee, B. (1982). Deficiencies in the ergonomic design of keyboard work and upper limb and neck disorders in operators. Journal of Human Ergology, 11, 31-36.[Medline] [Order article via Infotrieve]
• Moore, J.S., & Swanson, N. (2003). The effect of alternative keyboards on musculoskeletal symptoms and disorders. In J. Jacko & C. Stephanidis (Eds.), Proceedings of the 10th International Conference on Human-Computer Interaction, Part I (pp. 103-107). Mahwah, NJ: Erlbaum.
• Morelli, D.L., Johnson, P.W., Reddell, C.R., & Lau, P. (1995). User preferences between keyboards while performing "real" work. In Proceedings of the Human Factors and Ergonomics Society 39th Annual Meeting (pp. 361-365). Santa Monica, CA: Human Factors and Ergonomics Society.
• Muss, T., & Hedge, A. (1999). Effects of a vertical-split keyboard on posture, comfort and performance. In Proceedings of the Human Factors and Ergonomics Society 43rd Annual Meeting (pp. 496-500). Santa Monica, CA: Human Factors and Ergonomics Society.
• Nakaseko, M., Grandjean, E., Hunting, W., & Gierer, R. (1985). Studies on ergonomically designed alphanumeric keyboards. Human Factors, 27, 175-187.[Medline] [Order article via Infotrieve]
• NPD Group. (2006). Retail tracking and market research for input devices. Port Washington, NY: Author.
• Rempel, D., Bach, J., Gordon, L., Tal, R. (1998). Effects of forearm pronation/supination on carpal tunnel pressure. Journal of Hand Surgery, 23, 38-42.
• Rempel, D., Barr, A., Brafman, D., & Young, E. (2007). The effects of six keyboard designs on wrist and forearm postures. Applied Ergonomics, 38, 298-308.
• Rempel, D., Keir, P.J., & Bach, J.M. (in press). Effect of wrist posture on carpal tunnel pressure while typing. Journal of Orthopaedic Research.
• Rempel, D., Nathan-Roberts, D., Chen, B.Y., & Odell, D. (in press). The effects of split keyboard geometry on upper body postures. Ergonomics.
• Rose, M.J. (1991). Keyboard operating posture and actuation force: Implications for muscle over-use. Applied Ergonomics, 22, 198-203.[CrossRef][Medline] [Order article via Infotrieve]
• Sauter, S.L., Schleifer, L.M., & Knutson, S.J. (1991). Work posture, workstation design, and musculoskeletal discomfort in a VDT data entry task. Human Factors, 33, 151-167.[Medline] [Order article via Infotrieve]
• Simoneau, G.G., Marklin, R.W., & Berman, J.E. (2003). Effects of computer keyboard slope on wrist posture and forearm electromyography of typists without musculoskeletal disorders. Physical Therapy, 83, 816-830.[Abstract/Free Full Text]
• Smith, M.J., Cohen, B.G.F., & Stammerjohn, J.W. (1981). An investigation of health complaints and job stress in video display operations. Human Factors, 23, 387-400.[Medline] [Order article via Infotrieve]
• Smith, M.J., Karsh, B.-T., Conway, F.T., Cohen, W.J., James, C.A., Morgan, J.J., et al. (1998). Effects of a split keyboard design and wrist rest on performance, posture, and comfort. Human Factors, 40, 324-336.[CrossRef][Medline] [Order article via Infotrieve]
• Swanson, N.G., Galinsky, T.L., Cole, L.L., Pan, C.S., & Sauter, S.L. (1997). The impact of keyboard design on comfort and productivity in a text-entry task. Applied Ergonomics, 28, 9-16.[CrossRef][Medline] [Order article via Infotrieve]
• Thompson, D., Thomas, J., Cone, J., Daponte, A., & Markison, R. (1990). Analysis of the TONY! variable geometry VDT keyboard. In Proceedings of the Human Factors and Ergonomics Society 34th Annual Meeting (pp. 365-369). Santa Monica, CA: Human Factors and Ergonomics Society.
• Tittiranonda, P., Burastero, S., Armstrong, T., & Rempel, D. (1999). Workplace use of an adjustable keyboard: Adjustment preferences and effect on wrist posture. American Industrial Hygiene Association Journal, 60, 340-348.[Medline] [Order article via Infotrieve]
• Tittiranonda, P., Rempel, D., Armstrong, T., & Burastero, S. (1999). Effect of four computer keyboards in computer users with upper extremity musculoskeletal disorders. American Journal of Industrial Medicine, 35, 647-661.[CrossRef][Medline] [Order article via Infotrieve]
• Verhagen, A.P., Karels, C., & Bierma-Zeinstra, S.M. (2006). Ergonomic and physiotherapeutic interventions for treating work-related complaints of the arm, neck or shoulder in adults. Cochrane Database Systematic Reviews, 19(3), CD003471.
• Weiss, N.D., Gordon, L., Bloom, T., So, Y., & Rempel, D.M. (1995). Wrist position of lowest carpal tunnel pressure and implications for splint design. Journal of Bone and Joint Surgery, 77A, 1695-1699.
• Zecevic, A., Miller, D.I., & Harburn, K. (2000). An evaluation of the ergonomics of three computer keyboards. Ergonomics, 43, 55-72.[Medline] [Order article via Infotrieve]
• Zipp, P., Haider, E., Halpern, N., & Rohmert, W. (1983). Keyboard design through physiological strain measurements. Applied Ergonomics, 14, 117-122.[CrossRef][Medline] [Order article via Infotrieve]

Human Factors: The Journal of the Human Factors and Ergonomics Society, Vol. 50, No. 3, 385-392 (2008)
DOI: 10.1518/001872008X312215


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This Article Abstract Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Rempel, D. Search for Related Content PubMed Articles by Rempel, D. Social Bookmarking                         What's this?