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Usability Evaluation of Slanted Computer Mice.

Miguel L Lourenço1,2, Fátima Lanhoso2, Denis A Coelho3

  • 1Research Unit for Inland Development, Guarda Polytechnic Institute, 6300-559 Guarda, Portugal.

International Journal of Environmental Research and Public Health
|April 30, 2021
PubMed
Summary

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Slanted computer mice may improve usability for preventing musculoskeletal disorders. Smaller slanted devices, relative to hand size, are objectively more efficient and align with user preferences, enhancing computer ergonomics.

Area of Science:

  • Ergonomics
  • Human-Computer Interaction
  • Musculoskeletal Disorder Prevention

Background:

  • Slanted pointing devices may prevent musculoskeletal disorders but face user acceptance challenges due to perceived lower ease of use.
  • This study investigates the usability of slanted computer mice compared to traditional horizontal devices.

Purpose of the Study:

  • To compare the subjective usability of three sizes of slanted computer mice against a horizontal reference device.
  • To objectively measure usability parameters like effectiveness and efficiency for slanted mice.
  • To explore the relationship between hand size, slanted mouse size, and user preference.

Main Methods:

  • 37 participants provided subjective usability ratings for four pointing devices (three slanted, one horizontal).
Keywords:
computer mousediscomfortease of useeffectivenessefficiencyeffortpreferencesatisfactionslanted pointing deviceusability

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  • Objective usability parameters were recorded for a subset of 10 participants using a standardized graphical task protocol.
  • Effectiveness and efficiency were calculated based on recorded task data.

    • Main Results:

    • Subjective preferences showed minor variations across different hand size groups.
    • Objective efficiency results correlated with subjective findings, supporting the hypothesis that smaller slanted devices are easier to use.
    • Weighted efficiency ranged from 68% to 75%, with differences aligning with preference rankings.

    Conclusions:

    • Smaller slanted computer mice, tailored to user hand size, offer improved usability and efficiency.
    • Findings suggest that slanted devices can be a viable option for computer ergonomics and musculoskeletal disorder prevention.
    • The study demonstrates consistency between subjective user experience and objective performance metrics for slanted pointing devices.