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Related Experiment Videos

A quantitative model for designing keyboard layout.

K K Shieh1, C C Lin

  • 1Department of Industrial Management, National Taiwan University of Science and Technology, Taipei, R.O.C. kk@im.ntust.edu.tw

Perceptual and Motor Skills
|April 24, 1999
PubMed
Summary

This study found that letter frequency, hand/finger alternation, and finger choice significantly impact keytapping times. These findings inform ergonomic keyboard design for improved typing efficiency.

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Area of Science:

  • Human-Computer Interaction
  • Ergonomics
  • Typing Performance Analysis

Background:

  • Optimizing typing speed and comfort is crucial in human-computer interaction.
  • Traditional QWERTY keyboard layout may not be ergonomically optimal.
  • Understanding the quantitative relationship between typing mechanics and speed is essential.

Purpose of the Study:

  • To analyze the quantitative relationship between keytapping times and ergonomic principles in typewriting.
  • To identify key factors influencing typing speed and efficiency.
  • To propose a protocol for designing ergonomic keyboard layouts.

Main Methods:

  • Collected and analyzed keytapping times and key-operating characteristics of a subject typing on QWERTY and Dvorak keyboards for six weeks each.
  • Utilized statistical analysis to determine significant factors affecting keytapping times.
  • Developed a regression equation to model the relationship between keytapping times and ergonomic principles.

Main Results:

  • Keytapping times are significantly influenced by the characteristics of typed material and hand/finger movements.
  • Letter association frequency, consecutive use of the same hand or finger, and the specific finger used were the most significant factors.
  • A regression equation was successfully fitted to the data, quantifying the relationship.

Conclusions:

  • Ergonomic principles, particularly those related to letter sequencing and hand/finger utilization, are critical determinants of typing speed.
  • The developed regression equation provides a basis for quantitatively optimizing keyboard layouts.
  • A protocol for designing computerized keyboard layouts based on these ergonomic principles was proposed.

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