Intellectual functioning in old and very old age: cross-sectional results from the Berlin Aging Study.
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Publication Details
Output type: Journal article
Author list: Lindenberger, Baltes
Publisher: American Psychological Association
Publication year: 1997
Journal: Psychology and Aging (0882-7974)
Volume number: 12
Issue number: 3
Start page: 410
End page: 32
Number of pages: -377
ISSN: 0882-7974
eISSN: 1939-1498
Languages: English-Great Britain (EN-GB)
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Open access status: green
Full text URL: https://pure.mpg.de/pubman/item/item_2517892_6/component/file_2522137/UL_Intellectual_1997.pdf
Abstract
This study documents age trends, interrelations, and correlates of intellectual abilities in old and very old age (70-103 years) from the Berlin Aging Study (N = 516). Fourteen tests were used to assess 5 abilities: reasoning, memory, and perceptual speed from the mechanic (broad fluid) domain and knowledge and fluency from the pragmatic (broad crystallized) domain. Intellectual abilities had negative linear age relations, with more pronounced age reductions in mechanic than in pragmatic abilities. Interrelations among intellectual abilities were highly positive and did not follow the mechanic-pragmatic distinction. Sociobiographical indicators were less closely linked to intellectual functioning than sensory-sensorimotor variables, which predicted 59% of the total reliable variance in general intelligence. Results suggest that aging-induced biological factors are a prominent source of individual differences in intelligence in old and very old age.
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