Examining links between cognitive markers, movement initiation and change, and pedestrian safety in older adults


Objective: The purpose of this study was to determine the extent to which mobility indices (such as walking speed and postural sway), motor initiation, and cognitive function, specifically executive functions, including spatial planning, visual attention, and within participant variability, differentially predicted collisions in the near and far sides of the road with increasing age. Methods: Adults aged over 45 years participated in cognitive tests measuring executive function and visual attention (using Useful Field of View; UFoV®), mobility assessments (walking speed, sit-to-stand, self-reported mobility, and postural sway assessed using motion capture cameras), and gave road crossing choices in a two-way filmed real traffic pedestrian simulation. Results: A stepwise regression model of walking speed, start-up delay variability, and processing speed) explained 49.4% of the variance in near-side crossing errors. Walking speed, start-up delay measures (average & variability), and spatial planning explained 54.8% of the variance in far-side unsafe crossing errors. Start-up delay was predicted by walking speed only (explained 30.5%). Conclusion: Walking speed and start-up delay measures were consistent predictors of unsafe crossing behaviours. Cognitive measures, however, differentially predicted near-side errors (processing speed), and far-side errors (spatial planning). These findings offer potential contributions for identifying and rehabilitating at-risk older pedestrians.

Publication DOI: https://doi.org/10.1016/j.aap.2015.12.019
Divisions: College of Health & Life Sciences > School of Psychology
College of Health & Life Sciences > Chronic and Communicable Conditions
College of Health & Life Sciences
Additional Information: © 2016, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords: cognition,mobility,older adults,pedestrian risk,UFOV,Public Health, Environmental and Occupational Health,Safety, Risk, Reliability and Quality,Human Factors and Ergonomics,Law
Publication ISSN: 1879-2057
Last Modified: 08 Jul 2024 07:21
Date Deposited: 27 Jan 2016 10:10
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://www.sci ... 1640?via%3Dihub (Publisher URL)
PURE Output Type: Article
Published Date: 2016-04
Published Online Date: 2016-02-10
Accepted Date: 2015-12-14
Submitted Date: 2015-07-25
Authors: Geraghty, Jennifer
Holland, Carol (ORCID Profile 0000-0002-1846-8897)
Rochelle, Kim

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