EFFECTS OF A CHAIR MOUNTED SPLIT KEYBOARD ON POSTURE COMFORT AND PERFORMANCE

Gregory Shaw
Alan Hedge
Cornell Univ., Dept. DEA

and
John Bertram
Cornell Univ., Dept. Anatomy

August, 1996

SLIDES

  1. Effects of a Chair Mounted Split Keyboard...

  2. Justification:

  3. Researchers have linked typing posture to keyboard related injuries.

  4. How is posture related to musculoskeletal injury?

  5. Design Interventions

  6. An alternative design intervention:

  7. The manufacturer claims the following:

  8. Research Design

  9. Research questions

  10. Study Design

  11. Dependent variables

  12. Experimental Protocol

  13. Results

  14. Comparison of extreme wrist angles

  15. Ulnar deviation means for all 12 subjects

  16. Wrist extension means for all 12 subjects

  17. Influence of secondary variables on wrist posture.

  18. Wrist posture during cursor positioning

  19. Upper body posture - Videomotion Analysis

  20. Postural variables while typing

  21. Postural variables while cursor positioning

  22. Upper Body Posture I

  23. Upper Body Posture I (Continued)

  24. Upper Body Posture II

  25. Upper Body Posture II (Continued)

  26. Typing performance:

  27. Typing accuracy (%)

  28. Individual Questionnaire Results:

  29. Comparison Questionnaire Results:

  30. Discussion

  31. Follow up study:

  32. Follow-up study results:

  33. Wrist movement scatter plot for subject #6

  34. Wrist movement scatter plot for subject #2

  35. Upper body posture

  36. Contradictory evidence:

  37. Implications:

  38. Future Study

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