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| Study: Older may indeed be wiser TORONTO (UPI) -- Canadian researchers suggest older brains may be better at decision-making and that older may indeed mean wiser.
Researchers at the Baycrest Centre for Geriatric Care Rotman Research Institute in Toronto found older adults were less likely than younger people to filter out irrelevant information and were 30 percent better at memory tasks involving irrelevant information.
"We found that older brains are not only less likely to suppress irrelevant information than younger brains, but they can link the relevant and irrelevant pieces of information together and implicitly transfer this knowledge to subsequent memory tasks," Karen Campbell, a doctoral at the University of Toronto under the supervision Dr. Lynn Hasher of Rotman Research Institute, says in a statement.
The study, published in Psychological Science, tested 24 older adults ages 60-73 and 24 younger adults ages 17-29 on two computer-based memory tasks involving irrelevant information.
"This could be a silver lining to aging and distraction," Hasher says in a statement. "Older adults with reduced attentional regulation seem to display greater knowledge of seemingly extraneous co-occurrences in the environment than younger adults."
As this type of knowledge is thought to play a critical role in real world decision-making, older adults may be the wiser decision-makers compared to younger adults because they have picked up so much more information, the study says.
Copyright 2010 by United Press International |
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| Clinical trial set for Alzheimer's drink CHICAGO (UPI) -- U.S. researchers are testing if a nutritional drink helps cognitive performance in those with moderate Alzheimer's disease.
The researchers at Rush University Medical Center in Chicago are leading a national clinical trial of Souvenaid -- a nutritional beverage shown in a European trial to improve verbal recall in people with mild Alzheimer's disease.
"Our primary goal is to see whether Souvenaid can slow the worsening of memory difficulties in persons with mild to moderate Alzheimer's who are already taking approved treatments for the disease," Dr. Raj Shah, the lead investigator, said in a statement.
The 12-week European study, published in Alzheimer's & Dementia, involved 225 patients with mild Alzheimer's disease.
The U.S. double-blind study will involved 500 individuals enrolled at 40 sites across the country. Participants will drink 4 ounces of Souvenaid once a day for 24 weeks or a control product without the Souvenaid nutrients.
They will be tested on cognitive and functional performance -- including memory, language, executive functioning, information processing and recall.
Copyright 2010 by United Press International |
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| Gym could hurt eardrums EDMONTON, Alberta (UPI) -- A workout at the gym may be a strain on the ears, a Canadian researcher warns.
Bill Hodgetts of the University of Alberta says his research suggests almost half of the people working out in noisy gym-type environments and listening to an iPod turn up the volume to levels that may put them at risk for hearing loss -- likely due to the presence of background noise.
Hodgetts says it is not the listening level alone that's risky -- it's how long a person listens at that level.
In the study, almost half of the participants listened for a length of time during exercise that puts them at risk for hearing loss.
However, Hodgetts advises an easy way to avoid raising the volume to harmful levels may be getting better earphones that "seal" the ear canal so background noise is reduced.
The study is published in the International Journal of Audiology.
Copyright 2010 by United Press International |
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| Glucose levels may affect decision making VERMILLION, S.D. (UPI) -- Studies indicate there may be a link between blood glucose levels and decision making, U.S. researchers suggest.
Psychological scientists X.T. Wang and Robert D. Dvorak of the University of South Dakota investigated how blood glucose levels affect the way people think about present and future rewards.
Volunteers answered a series of questions asking if they would prefer to receive a certain amount of money tomorrow or a larger amount of money at a later date.
They responded to seven of the questions before and after drinking either a regular soda, containing sugar, or a diet soda, containing the artificial sweetener aspartame. Blood glucose levels were measured at the start of the experiment and after the volunteers drank the soda.
The results, reported in Psychological Science, showed people's preferences for current vs. later rewards may be influenced by blood glucose levels. The volunteers who drank the regular sodas and had higher blood glucose levels were more likely to select receiving more money at a later date while the volunteers who drank the diet sodas and had lower blood glucose levels were likelier to opt for receiving smaller sums of money immediately.
The results suggest when people have higher levels of blood glucose they tend to be more future-oriented.
Copyright 2010 by United Press International |
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