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Age-Related Mental Decline May Be Less Than Thought

Age-Related Mental Decline May Be Less Than Thought


THURSDAY, Sept. 16 (HealthDay News) -- All mental abilities appear to decline with advancing age, but the decreases aren't as sharp as some research has suggested, a new study contends.

In the study, Timothy Salthouse, a University of Virginia psychologist, analyzed scores from 1,616 adults, aged 18 to 80, who completed tests of five key cognitive (or "thinking") abilities: reasoning, spatial visualization, episodic memory, perceptual speed, and vocabulary.

The data from the participants in the Virginia Cognitive Aging Project were collected over an average test-retest interval of 2.5 years.

"There is now convincing evidence that even vocabulary knowledge and what's called 'crystallized intelligence' decline at older ages," Salthouse said in an American Psychological Association news release.

However, age-related declines in mental ability are smaller than previously believed, he said.

In his research, Salthouse took into account that the results of studies that repeatedly test people over a period of time could be affected by the fact that repeat test-takers become familiar with tests or testing strategies, and therefore do better as time goes on.

By factoring out what he called the "practice effects," Salthouse was better able to determine how the participants actually aged mentally, and found that while younger adults' mental abilities rose over time, older adults' abilities declined over time, but the changes were small in either case.

"Longitudinal comparisons in people of different ages may be even more complicated because the amount of longitudinal change may be partially determined by the individual's learning ability at a given age," he noted.

The study was published in a recent issue of the journal Neuropsychology.

More information

The U.S. Centers for Disease Control and Prevention offers tips for healthy aging.

Copyright © 2010 HealthDay. All rights reserved.

Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.


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