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Related Experiment Videos

How should Fitts' Law be applied to human-computer interaction?

D J Gillan1, K Holden, S Adam

  • 1Department of Psychology, University of Idaho, Moscow 83843, USA.

Interacting with Computers
|December 1, 1992
PubMed
Summary
This summary is machine-generated.

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Fitts' Law application in human-computer interaction requires understanding movement specifics. Tailoring models to movement sequences and target dimensions improves accuracy for tasks like text selection.

Area of Science:

  • Human-Computer Interaction
  • Cognitive Psychology
  • Usability Engineering

Background:

  • Fitts' Law is widely applied to predict human movement time in HCI.
  • General application of Fitts' Law may overlook task-specific movement characteristics.
  • Understanding user movement sequences and target properties is crucial for accurate modeling.

Purpose of the Study:

  • To challenge the universal applicability of Fitts' Law in HCI.
  • To investigate how movement sequences (point-click vs. point-drag) affect Fitts' Law model fit.
  • To determine optimal Fitts' Law parameters for text selection tasks.

Main Methods:

  • Conducted two experiments on text selection tasks with controlled movement sequences.
  • Applied various Fitts' Law models using different target size definitions (e.g., diagonal, horizontal, vertical extent).
Keywords:
NASA Center JSCNASA Discipline Number 06-10NASA Discipline Space Human FactorsNASA Program Space Human Factors

Related Experiment Videos

  • Analyzed pointing and dragging times for point-click and point-drag sequences.

    • Main Results:

    • For point-click, the diagonal target size provided the best fit for pointing time.
    • For point-drag, the vertical target size best fit pointing time, while dragging time fit models using terminal character dimensions.
    • Pointing was faster in point-click than point-drag; both pointing actions were faster than dragging.

    Conclusions:

    • Fitts' Law requires task-specific parameters, including movement sequence and direction, for accurate HCI analysis.
    • Interface design and analysis necessitate defining task characteristics before applying Fitts' Law.
    • Distinct models are needed for analyzing pointing and dragging movements in text selection.