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The study was based on
from over 1.1 million people, aged between 10 and 80 years old. The
show that our mental processing
remains relatively constant until the age of 60, but does start to decline from our
decade. The researchers said people's mental processing speed actually increases in their 20s and remains
until 60. Dr von Krause said: "Until
adulthood, the speed of information
in the task we studied barely changed." He added that older people do take longer to make
, but said this was because we become more
, and less impulsive and reckless as we age. The study could cast light on neurodegenerative
such as Alzheimer's.