Smelling the Way: Olfactory Modulation of Spatial Estimation and Path Integration in Virtual Reality

2026-09-26

AI Summary

This study investigates the role of olfaction in spatial cognition within vision-restricted virtual reality (VR) environments, aiming to elucidate localization and path integration mechanisms under multisensory fusion. A VR experimental platform was developed using a fan-based olfactory delivery device integrated with behavioral trajectory tracking. Two experiments evaluated the effects of odor feedback on linear localization and triangle completion tasks. Results indicate that visuo-olfactory misalignment induces directional biases, whereas distance-modulated olfactory feedback significantly reduces homing errors and triggers shifts in navigation strategies. By quantifying spatial behavioral differences mediated by olfactory intervention, this work provides empirical evidence for the design of multimodal immersive navigation systems.

Abstract

Spatial cognition enables individuals to perceive and interpret spatial relationships, estimate locations, and navigate within their surroundings. While vision plays a dominant role, other sensory modalities, particularly olfaction, can support spatial processing when visual cues are limited. This paper explores the effects of scent-delivery within virtual reality (VR) environments by using fan-mediated olfactory devices. We conducted two formal studies to evaluate the effects on spatial information acquisition. Study 1 (N=24) examined the participants'ability to localize a scent source while walking a linear path using two different olfactory devices. Study 2 (N=19) employed a triangle completion task, in which participants attempted to return to their starting point under varying rotation angles and olfactory conditions. Results indicate that scent-delivery feedback influenced spatial behavior in distinct ways across the two studies. In Study 1, visual-olfactory misalignment produced systematic directional biases without improving absolute localization accuracy. In Study 2, distance-modulated scent-delivery feedback reduced terminal homing error but also increased traveled distance and completion time, suggesting a more deliberate goal-confirmation strategy.

Problem

• spatial cognition
• olfactory modulation
• path integration
• virtual reality
• spatial estimation

Innovation

• Olfactory Modulation
• Virtual Reality
• Path Integration
• Spatial Estimation
• Multisensory Feedback