Advanced

Interacting Effects of Cognitive Load and Adult Age on the Regularity of Whole-Body Motion During Treadmill Walking

Verrel, Julius; Lövdén, Martin LU ; Schellenbach, Michael; Schaefer, Sabine and Lindenberger, Ulman (2009) In Psychology and Aging 24(1). p.75-81
Abstract
We investigated effects of concurrent cognitive task difficulty (n-back) on the regularity of whole-body movements during treadmill walking in women and men from 3 age groups (20-30, 60-70, and 70-80 years old). Using principal component analysis of individual gait patterns, we separated main (regular) from residual (irregular) components of whole-body motion. Proportion of residual variance (RV) was used as an index of gait irregularity. The gait in all age groups became more regular (reduced RV) upon introduction of a simple cognitive task (1-back), relative to walking without a concurrent cognitive task. In contrast, parametrically increasing working memory load from 1-back to 4-back led to age-differential effects, with gait patterns... (More)
We investigated effects of concurrent cognitive task difficulty (n-back) on the regularity of whole-body movements during treadmill walking in women and men from 3 age groups (20-30, 60-70, and 70-80 years old). Using principal component analysis of individual gait patterns, we separated main (regular) from residual (irregular) components of whole-body motion. Proportion of residual variance (RV) was used as an index of gait irregularity. The gait in all age groups became more regular (reduced RV) upon introduction of a simple cognitive task (1-back), relative to walking without a concurrent cognitive task. In contrast, parametrically increasing working memory load from 1-back to 4-back led to age-differential effects, with gait patterns becoming more regular in those 20-30 years old, becoming less regular in those 70-80 years old, and showing no significant effects in those 60-70 years old. Our results support the dual-process account of sensorimotor-cognitive interactions (O. Huxhold, S.-C. Li, F. Schmiedek, and U. Lindenberger, 2006), with age-general effects of internal versus external attentional focus and age-specific effects of resource competition with increasing cognitive task difficulty. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
aging, dual-tasking, gait, principal component analysis, working memory
in
Psychology and Aging
volume
24
issue
1
pages
75 - 81
publisher
American Psychological Association (APA)
external identifiers
  • wos:000264315800007
  • scopus:64649094323
ISSN
0882-7974
DOI
10.1037/a0014272
language
English
LU publication?
yes
id
06f004f2-1be5-4a47-971f-928cdc3943cf (old id 1401702)
date added to LUP
2009-06-15 10:36:12
date last changed
2017-10-01 04:28:18
@article{06f004f2-1be5-4a47-971f-928cdc3943cf,
  abstract     = {We investigated effects of concurrent cognitive task difficulty (n-back) on the regularity of whole-body movements during treadmill walking in women and men from 3 age groups (20-30, 60-70, and 70-80 years old). Using principal component analysis of individual gait patterns, we separated main (regular) from residual (irregular) components of whole-body motion. Proportion of residual variance (RV) was used as an index of gait irregularity. The gait in all age groups became more regular (reduced RV) upon introduction of a simple cognitive task (1-back), relative to walking without a concurrent cognitive task. In contrast, parametrically increasing working memory load from 1-back to 4-back led to age-differential effects, with gait patterns becoming more regular in those 20-30 years old, becoming less regular in those 70-80 years old, and showing no significant effects in those 60-70 years old. Our results support the dual-process account of sensorimotor-cognitive interactions (O. Huxhold, S.-C. Li, F. Schmiedek, and U. Lindenberger, 2006), with age-general effects of internal versus external attentional focus and age-specific effects of resource competition with increasing cognitive task difficulty.},
  author       = {Verrel, Julius and Lövdén, Martin and Schellenbach, Michael and Schaefer, Sabine and Lindenberger, Ulman},
  issn         = {0882-7974},
  keyword      = {aging,dual-tasking,gait,principal component analysis,working memory},
  language     = {eng},
  number       = {1},
  pages        = {75--81},
  publisher    = {American Psychological Association (APA)},
  series       = {Psychology and Aging},
  title        = {Interacting Effects of Cognitive Load and Adult Age on the Regularity of Whole-Body Motion During Treadmill Walking},
  url          = {http://dx.doi.org/10.1037/a0014272},
  volume       = {24},
  year         = {2009},
}