Title: Adaptive task prioritization in aging: Selective resource allocation to postural control is preserved in Alzheimer disease
Authors: Rapp, Michael A. ×
Krampe, Ralf
Baltes, Paul B. #
Issue Date: Jan-2006
Publisher: Amer psychiatric publishing, inc
Series Title: American journal of geriatric psychiatry vol:14 issue:1 pages:52-61
Abstract: Objective: With age, the performance of multiple tasks decreases, a pattern exaggerated in Alzheimer disease (AD). At the same time, recent research, based on adaptive theories of healthy aging, indicates a preference of older adults to allocate resources toward tasks of higher immediate value (e.g., postural control). This study investigated whether such models also hold for pathologic cognitive aging. Method: Using a dual-task paradigm, the authors combined a working memory with a postural control task under easy and difficult conditions in patients with AD, older adults, older adults low on performance on a cognitive marker test, and young adults (N = 40). Participants repeatedly performed a cognitive and a postural control task both simultaneously and in isolation over the course of eight sessions. Results: Consistent with earlier studies on divided attention in age and AD, the authors found large dual-task performance decrements with age and more so in AD. When not challenged, patients with AD showed large performance decrements under dual-task conditions in both postural control and working memory. With increasing difficulty in the postural control task, however, older adults, and more so patients with AD, maintained a high level of functioning in postural control, as compared with working memory. Conclusion: The findings indicate that the theory of selective optimization with compensation extends to pathologic aging and have broad implications for models of dual-task performance and executive control in aging and AD.
ISSN: 1064-7481
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Centre for Developmental Psychology (-)
× corresponding author
# (joint) last author

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