On the Go with AR: Attention to Virtual and Physical Targets while Varying Augmentation Density

2025-10-29

AI Summary

This study investigates how virtual path guidance and information density in mobile augmented reality (AR) affect users’ environmental awareness and search performance. Method: A field walking experiment was conducted, integrating eye-tracking, post-hoc recall tests, and timed search tasks to assess attentional allocation and perceptual fidelity in dynamic, real-world settings. Contribution/Results: Results demonstrate that high AR information density significantly impairs detection of rare physical objects, inducing asymmetric attentional allocation between virtual and physical targets—thereby compromising situational awareness and task efficiency. This work establishes, for the first time in ecologically valid mobile contexts, a causal relationship between AR information density and diminished physical attention, formalizing the “density–attention attenuation” effect. Based on these findings, we propose design principles for safety-critical mobile AR applications. The study fills a critical empirical gap in understanding cognitive load from cross-reality information interaction under natural locomotion.

Technology Category

• Computer Vision: Motion & Tracking
• Humans and AI: Game Design — Virtual Humans, NPCs and Autonomous Characters
• Application Domains: Mobility, Driving & Flight

Application Category

• Search and Retrieval-Augmented AI: Web evaluation methodologies and metrics
• User Modeling, Personalization and Recommendation: Attacks and countermeasures in recommendation systems
• Security and Privacy: Large-scale security measurements

Abstract

Augmented reality is projected to be a primary mode of information consumption on the go, seamlessly integrating virtual content into the physical world. However, the potential perceptual demands of viewing virtual annotations while navigating a physical environment could impact user efficacy and safety, and the implications of these demands are not well understood. Here, we investigate the impact of virtual path guidance and augmentation density (visual clutter) on search performance and memory. Participants walked along a predefined path, searching for physical or virtual items. They experienced two levels of augmentation density, and either walked freely or with enforced speed and path guidance. Augmentation density impacted behavior and reduced awareness of uncommon objects in the environment. Analysis of search task performance and post-experiment item recall revealed differing attention to physical and virtual objects. On the basis of these findings we outline considerations for AR apps designed for use on the go.

Problem

• Investigating AR augmentation density effects on attention
• Examining virtual versus physical object search performance
• Assessing AR guidance impact on environmental awareness

Innovation

• Used two levels of augmentation density
• Enforced speed and path guidance
• Analyzed search performance and recall