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The effects of aging on four behavioral tests.

Authors
Schumacher-JM
Source
University of Michigan, Ann Arbor Michigan, 1981 Jul; :1-38
Link
NIOSHTIC No.
00134006
Abstract
The effects of aging on cognitive function were investigated. Cognitive tests were given to subjects in various age groups to define changes in cognitive functioning due to age. A color word test, a memory scanning test, a digit span test, and a continuous recognition for numbers test were administered. In children and young adults, performance on the word color test increased with age due to decreased perceptual operating time; however, perceptual operating time increased in subjects over 65. Younger subjects performed better on the memory scanning test. Digit span results for average ages of 22.7, 39.6, and 76.6 years were 7.3, 7.6, and 6.1, respectively, indicating that digit span decreased significantly with age, but the change was not apparent until around age 60. For the continuous recognition test, the same subjects had sensitivities of 1.13, 1.07, and 0.411 for young, middle, and old subjects, respectively. The author concludes that performance on all four tests decreases with age. The ages at which the changes take place are not clear cut or consistent; however, decrements occur during or after age 60.
Keywords
NIOSH-Grant; Gerontology; Neuropathology; Psychology; Brain-disorders; Muscular-disorders; Medical-monitoring; Physiological-measurements
Publication Date
19810701
Document Type
Final Grant Report
Funding Amount
1451564
Funding Type
Grant
Fiscal Year
1981
NTIS Accession No.
PB84-239383
NTIS Price
A04
Identifying No.
Grant-Number-R01-OH-00707
NIOSH Division
OEP
Source Name
University of Michigan, Ann Arbor Michigan
State
MI
Performing Organization
University of Michigan at Ann Arbor
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