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An Assessment Method and Toolkit to Evaluate Keyboard Design on Smartphones
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Application of a genetic algorithm to the keyboard layout problem.

Amir Hosein Habibi Onsorodi1, Orhan Korhan1

  • 1Department of Industrial Engineering, Eastern Mediterranean University, Famagusta, North Cyprus, Turkey.

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This study optimized keyboard layout using a genetic algorithm based on common English word frequencies. The new ergonomic keyboard design reduced finger travel distance by an average of 6.04% compared to QWERTY.

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Area of Science:

  • Human-Computer Interaction
  • Ergonomics
  • Computational Linguistics

Background:

  • Increasing computer use necessitates ergonomic solutions to mitigate musculoskeletal discomfort.
  • Keyboard design significantly impacts user upper extremity health and satisfaction.
  • Existing ergonomic keyboard optimizations often focus on letter co-occurrence, not comprehensive word usage.

Purpose of the Study:

  • To develop an ergonomically optimized keyboard layout.
  • To minimize finger travel distance for enhanced user comfort and efficiency.
  • To incorporate the frequency of the 3,000 most used English words into keyboard design.

Main Methods:

  • A Text Analyzer was used to calculate the frequency of letter pairs from the 3,000 most used English words.
  • A genetic algorithm was employed to optimize keyboard alphanumeric character placement.
  • The total finger travel distance was minimized as the primary optimization objective.

Main Results:

  • The proposed keyboard layout demonstrated a reduced finger travel distance compared to the standard QWERTY layout across various text types.
  • An average improvement of 6.04% in finger travel distance was achieved.
  • The optimized layout shows potential for reducing user fatigue and increasing typing efficiency.

Conclusions:

  • The novel ergonomic keyboard design effectively reduces finger travel distance.
  • This optimization contributes to mitigating musculoskeletal discomfort associated with computer use.
  • The proposed keyboard layout offers a practical solution for improving user experience and reducing fatigue.