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This study compared touchscreens, mice, and touchpads for Microsoft Word tasks. Results show mice and touchscreens offer distinct efficiency advantages, suggesting customized menus for complex applications.

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Area of Science:

  • Human-Computer Interaction
  • Usability Engineering
  • Software Ergonomics

Background:

  • Evaluating user interface (UI) efficiency across different input devices is crucial for complex software.
  • Microsoft Word serves as a benchmark for complex application usability studies.
  • ISO-9241-11 standards provide a framework for assessing usability through efficiency, effectiveness, and satisfaction.

Purpose of the Study:

  • To compare the usability of direct (touchscreen) versus indirect (mouse, touchpad) manipulation devices for Microsoft Word tasks.
  • To identify task-specific efficiencies and suggest improvements for complex application UIs.
  • To propose a customized task menu optimizing interaction based on device capabilities.

Main Methods:

  • Fifty-four participants, grouped by Microsoft Word expertise, performed 56 tasks using a mouse, touchpad, and touchscreen.
  • Usability assessed using efficiency, effectiveness, and satisfaction metrics per ISO-9241-11.
  • One-way ANOVAs and ANCOVA were used to analyze task-level efficiency and effectiveness.

Main Results:

  • Touchscreen outperformed other devices in only one specific task for effectiveness.
  • 19 tasks (34%) were significantly more efficient with a mouse.
  • 21 tasks (37.5%) were significantly more efficient with a touchscreen.

Conclusions:

  • Neither mouse nor touchscreen is universally superior for all Microsoft Word tasks.
  • Customized menus, segregating touch-friendly and mouse-friendly actions, are recommended for MS Word-like applications.
  • Optimizing UI design based on input device strengths enhances user efficiency and satisfaction.