Article published In: The Mental Lexicon
Vol. 20:1 (2025) ► pp.93–121
The impact of walking and visual distraction on lexicality judgements
Naomi Vingron | McGill UniversityMontrealQC | Center for Interdisciplinary Research in Rehabilitation of Greater MontrealMontrealQC
Nancy Azevedo | Center for Interdisciplinary Research in Rehabilitation of Greater MontrealMontrealQC
Eva Kehayia | McGill UniversityMontrealQC | Center for Interdisciplinary Research in Rehabilitation of Greater MontrealMontrealQC
Published online: 22 January 2026
https://doi.org/10.1075/ml.24002.vin
https://doi.org/10.1075/ml.24002.vin
Abstract
Walking has been the focus of much of the existing work on multitasking given its complexity as a cognitive
process and importance in daily life. This complexity is evidenced by gait variation observed in dual-task contexts. However, an
open question concerns how walking effects concurrently performed cognitive tasks. Thus, we use virtual reality to investigate how
walking and visual distraction modulate language processing in an ecologically valid, yet controlled manner. In this novel
experimental paradigm, we gradually increase the cognitive burden on participants’ lexical decision responses by adding visual
distractors and concurrent walking demands. Accordingly, healthy, young participants performed a lexical decision task as either
(1) a single-task+, while seated and with randomly appearing visual distractors, or as (2) a multitask, while walking on a
self-paced treadmill through a VR city scape including visual distractors. Participants generally made faster lexical decisions
while walking. However, in the single-task+ condition, participants made more errors when a distractor was present. These effects
were somewhat modulated by individual differences in visual processing. Crucially, no clear dual-task cost was observed; rather,
behavior adapted to increased demands within a specific domain. Overall, these findings suggest an interplay of both task-related
and individual characteristics determining multitask performance.
Keywords: lexical decision, visual processing, gait, multitasking, virtual reality
Article outline
- Introduction
- The present study
- Methods
- Participants
- Lexical Decision Task (LDT)
- Visuospatial Scanning Task (VISSTA)
- Procedure
- Session 1
- Session 2
- Participants
- Analysis 1: Multitask performance
- Statistical models
- Error rate
- Correct response time
- Analysis 2: Individual differences in visual processing
- Data preprocessing
- Error rate
- Correct response time
- Supplementary analysis: Generalized additive mixed model
- Error rate
- Correct response time
- Discussion
- Limitations & future directions
- Conclusion
- Notes
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