Using video animation to assess mobility in older adults

Although the importance of the context of task performance in the assessment of mobility in older adults is generally understood, there is little empirical evidence that demonstrates how sensitive older adults are to subtle changes in task demands. Thus, we developed a novel approach to examine this...

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Bibliographic Details
Published in:The journals of gerontology. Series A, Biological sciences and medical sciences Biological sciences and medical sciences, 2011-02, Vol.66 (2), p.217-227
Main Authors: Marsh, Anthony P, Ip, Edward H, Barnard, Ryan T, Wong, Yue-Ling, Rejeski, W Jack
Format: Article
Language:English
Subjects:
Aged
Aged, 80 and over
Aging
Aging - physiology
Arthritis - physiopathology
Comorbidity
Diabetes Mellitus - physiopathology
Female
Heart Diseases - physiopathology
Human performance
Humans
Hypertension - physiopathology
Journal of Gerontology: MEDICAL SCIENCES
Male
Mobility
Movement
Older people
Quantitative psychology
Studies
Task Performance and Analysis
Video
Walking
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Summary:Although the importance of the context of task performance in the assessment of mobility in older adults is generally understood, there is little empirical evidence that demonstrates how sensitive older adults are to subtle changes in task demands. Thus, we developed a novel approach to examine this issue. We collected item response data to 81 animated video clips, where various mobility-related tasks were modified in a systematic fashion to manipulate task difficulty. The participants (N = 234), 166 women and 68 men, had an average age of 81.9 years and a variety of comorbidities. Histograms of item responses revealed dramatic and systematic effects on older adults' self-reported ability when varying walking speed, use of a handrail during ascent and descent of stairs, walking at different speeds outdoors over uneven terrain, and carrying an object. For example, there was almost a threefold increase in reporting the inability to walk at the fast speed compared with the slow speed for a minute or less, and twice as many participants reported the inability to walk at the fast speed outdoors over uneven terrain compared with indoors. The data provide clear evidence that varying the contextual features and demands of a simple task such as stair climbing has a significant impact on older adults' self-reporting of ability related to mobility. More work is needed on the psychometric properties of such assessments and to determine if this methodology has conceptual and clinical relevance in studying mobility disability.
ISSN:1079-5006
1758-535X
DOI:10.1093/gerona/glq209