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Visual task performance using a monocular see-through head-mounted display (HMD) while walking.

Terhi Mustonen1, Mikko Berg2, Jyrki Kaistinen1

  • 1Institute of Behavioural Sciences.

Journal of Experimental Psychology. Applied
|November 6, 2013
PubMed
Summary
This summary is machine-generated.

Using head-mounted displays (HMDs) while walking impairs cognitive task performance and gait control. Visual vigilance tasks are particularly affected, suggesting careful HMD design is needed for mobile users.

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Area of Science:

  • Human-Computer Interaction
  • Cognitive Psychology
  • Human Factors Engineering

Background:

  • Head-mounted displays (HMDs) enable augmented reality experiences by overlaying digital information onto the user's view of the real world.
  • While HMDs offer potential for mobile applications, simultaneous engagement with displayed content and the physical environment poses attentional challenges.
  • Gait control during locomotion can be further complicated by the cognitive load imposed by HMD-based tasks.

Purpose of the Study:

  • To investigate the impact of HMD-administered cognitive tasks on users' walking performance.
  • To determine how different cognitive task demands (working memory load, visual vigilance) affect performance while walking with an HMD.
  • To assess the reciprocal effects of HMD use on both cognitive task performance and gait parameters.

Main Methods:

  • Twenty-four participants completed three cognitive tasks (high/low working memory load, visual vigilance) using an HMD.
  • Performance was evaluated both in a seated condition and while simultaneously performing a paced walking task in a controlled setting.
  • Key metrics included cognitive task performance (d', reaction time) and walking performance (speed, path overruns).

Main Results:

  • Paced walking significantly degraded performance across all HMD cognitive tasks compared to seated conditions.
  • Visual vigilance tasks showed a greater performance decline than memory-based tasks during walking.
  • HMD tasks negatively impacted walking speed and path control, with effects varying based on task complexity.

Conclusions:

  • Mobile HMD use can substantially impair a user's ability to process displayed information and maintain normal gait.
  • Cognitive tasks requiring continuous visual monitoring of the HMD should be minimized or redesigned for mobile applications.
  • Future HMD design must consider the interplay between cognitive load, environmental interaction, and locomotion to ensure user safety and task efficacy.