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Related Experiment Videos

Address entry while driving: speech recognition versus a touch-screen keyboard.

Omer Tsimhoni1, Daniel Smith, Paul Green

  • 1University of Michigan Transportation Research Institute, Ann Arbor, Michigan 48109-2150, USA. omert@umich.edu

Human Factors
|February 16, 2005
PubMed
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Entering addresses while driving is safer with speech recognition systems. Word-based speech recognition was fastest and typing on a touch-screen keyboard most impaired vehicle control.

Area of Science:

  • Human-Computer Interaction
  • Transportation Safety
  • Cognitive Psychology

Background:

  • In-vehicle navigation systems are increasingly common, but driver input can be distracting.
  • Evaluating the safety and efficiency of different address entry methods is crucial for system design.

Purpose of the Study:

  • To compare the effects of word-based speech recognition, character-based speech recognition, and touch-screen keyboard entry on driving performance.
  • To assess vehicle control, task completion time, glance behavior, and subjective workload across different input methods.

Main Methods:

  • A driving simulator experiment was conducted with participants entering addresses using three distinct methods.
  • Vehicle control (lateral position), task measures (time on task), glance timing, and subjective ratings were collected.

Related Experiment Videos

  • Driving scenarios varied in visual demand.

    • Main Results:

    • Word-based speech recognition had the shortest task time (15.3 s), followed by character-based speech recognition (41.0 s) and touch-screen keyboard (86.0 s).
    • Touch-screen keyboard entry significantly increased lateral position variability (0.21 m) compared to speech methods (0.13 m), indicating degraded vehicle control.
    • Speech recognition, despite potential accuracy issues, generally favored vehicle control over touch-screen input.

    Conclusions:

    • Speech recognition systems are favorable for in-vehicle address entry due to improved vehicle control and efficiency.
    • Touch-screen keyboard use during driving leads to significant performance decrements.
    • Findings inform the design of safer in-vehicle systems, including navigation, email, and internet applications.