Journal
NEUROBIOLOGY OF AGING
Volume 30, Issue 4, Pages 521-524Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.neurobiolaging.2008.11.013
Keywords
Cognition; Cross-sectional design; Longitudinal design; Neurobiology
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Salthouse claims that cognitive aging starts around 20 years of age. The basis for this claim is cross-sectional data. He dismisses longitudinal data, which typically show the cognitive decline to start much later, around 60 years of age. He states that longitudinal data cannot be trusted because they are flawed. There is a confounding between the effects of maturation and retest effects. We challenge Salthouse's strong claim on four accounts. (C) 2009 Elsevier Inc. All rights reserved.
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