SAN FRANCISCO, May 1, 2013 /PRNewswire/ -- A study published today pitted a
commercially available brain fitness exercise against crossword puzzles.
Researchers at the University of Iowa, reporting in the peer-reviewed journal
PLOS ONE found that the group using the computerized exercise for just 10 hours
had significant gains in cognitive function, while the group doing crosswords on
the computer for an equal amount of time had no significant improvements.
"It's the 'use it or lose it' phenomenon, with a twist," said the study's lead
researcher Dr. Fredric Wolinsky. "We learned that what you are using matters.
Here, the exercise designed by neuroscientists delivered significant gains that
generalized to daily life, and the crosswords, which a lot of people have placed
their faith in, showed no measurable benefits. "
The study also broke new scientific ground in comparing older and younger users,
users on their own at home against users in a supervised setting, and users
spending varying amounts of time on the brain fitness exercise.
"Some of the results pleasantly surprised us," Wolinsky said. "Others confirmed
what we believed from earlier research."
The researchers separated 681 generally healthy people into four groups. One
group was given computerized crossword puzzles, while the other three groups did
the brain fitness exercise in different settings - on their own at home, in a
supervised setting, or in a supervised setting with four extra hours of
"booster" training. Researchers also compared participants aged 50-64 against
those aged 65-plus.
The game-like exercise was originally developed with funding from the National
Institutes of Health and is now commercially available from the brain fitness
company Posit Science. Users train their brains by dividing their attention
between a task in the center of the screen (identifying which of a pair of
similar vehicles were displayed for a split second) and a task at the periphery
(locating a target road sign on the periphery displayed for a split second among
distractor images). As users get answers correct, the images flash for shorter
and shorter periods of time, the images get more and more similar, and the
objects in the periphery move further out with more distractors. The exercise is
designed to simultaneously improve processing speed, attention, working memory,
useful field of view, and other executive functions.
Researchers found that the exercise users showed significant gains across all
these cognitive areas. When measured a year after being trained, they retained
significant improvements, which were equivalent to what an average person at
these ages is expected to lose in cognitive abilities over a period of nearly
To most people it is probably surprising that just 10 hours of brain exercise
can deliver gains that are measurable at all a year later," said Wolinsky. "You
certainly would not expect that from physical exercise. Yet, here we saw gains
of 1.5 to 6.6 years across the different standardized tests." Gains of that
magnitude are consistent with other studies of Posit Science exercises published
in scientific and medical journals, including gains of about 10 years noted
immediately after training.
Researchers reported that the instruments used to measure gains in the study
were generally quite different than the exercise and demonstrated that the gains
generalized and extended beyond the tasks trained.
"This is consistent with past studies that show our unique approach to brain
exercises drive changes that generalize to daily life," said Dr. Henry Mahncke,
CEO of Posit Science, the commercial distributor of the studied exercise.
"Numerous studies have shown our exercises not only improve cognitive function,
but that those gains translate to common daily tasks, as well as improved mood,
confidence, functional independence and various measures of quality of life."
Researchers wanted to determine if more training would result in greater gains.
The sub-group of participants that received an extra four hours of training
posted even greater gains.
"There are now some 70 published journal articles on the multitude of benefits
from training with our exercises," said Dr. Mahncke. "Once again this study
confirms that more exercise is better. We recommend fitting brain exercise into
your life much like physical exercise. A minimum of 30 minutes three times a
week is good, and getting in more hours each week is even better."
Since most of the research on the impact of cognitive training on the aging
brain has been done in populations aged 65 and older, researchers were
particularly interested in whether gains would be as great in a younger
population. One theory held that since older people had greater cognitive
decline, they had a larger opportunity to improve than younger folks who might
hit a ceiling on how much they could improve. While another theory observed that
the greatest gains are made by those who make it deepest into the stimulus sets
and that younger people might make it further and have greater gains.
Dr. Wolinsky noted that the researchers were somewhat surprised that there was
no difference between the group aged 50-64 and the group aged 65 and older in
their ability to make large gains.
"This suggests that as with physical exercise, anyone can improve at any age,"
said Dr. Wolinsky. "And, as with physical exercise, why would you wait until you
are old to get into better shape?"
Researchers were also surprised that people who did the exercises on their own
at home did just as well as people who did them under supervision. This
indicates that the training can be widely deployed at low cost and to remote
The exercise used in the study is marketed by Posit Science as "Double Decision"
on its online BrainHQ platform. It can be tried for free online (at BrainHQ.com)
or downloaded from the iPad app store (search for BrainHQ), and the Double
Decision exercise along with 19 other exercises can be accessed for a monthly
subscription of $14 or annual subscription of $96.
About Posit Science Posit Science is the leading provider of clinically proven
brain fitness training. Its exercises, available online at www.BrainHQ.com and
on the iPad, have been shown to significantly improve brain speed, attention,
memory and numerous standard measures of quality of life in multiple studies
published in some 70 peer-reviewed articles in leading science and medical
journals. Three public television documentaries, as well as numerous stories on
news programs, in national magazines, and in major newspapers, have featured
Posit Science's work. The company's global science team is led by renowned
neuroscientist Dr. Michael Merzenich.
Press Contact Dr. Henry Mahncke, CEO Posit Science, 415-672-0582 cell
SOURCE Posit Science