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Major Issues in Cognitive Aging$
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Timothy Salthouse

Print publication date: 2009

Print ISBN-13: 9780195372151

Published to Oxford Scholarship Online: May 2010

DOI: 10.1093/acprof:oso/9780195372151.001.0001

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Within-Person and Across-Time Comparisons

Within-Person and Across-Time Comparisons

(p.35) 2 Within-Person and Across-Time Comparisons
Major Issues in Cognitive Aging

Timothy A. Salthouse

Oxford University Press

One of the important questions in the field of cognitive aging is what is responsible for the different age relations found in cross-sectional and longitudinal comparisons of cognitive functioning. This chapter discusses the major factors that have been postulated to contribute to different age trends in cross-sectional and longitudinal comparisons. Two important observations are relevant to the interpretation of cognitive aging phenomena. First, similar relative age trends have been reported from the earliest systematic studies dating from the 1920s; and second, patterns of cognitive aging in nonhuman animals closely resemble those found in humans. These findings indicate that the phenomenon of cognitive aging can be inferred to be at least somewhat generalizable across specific historical contexts and different species.

Keywords:   cognitive aging, cognition, cognitive functioning, age trends

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