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Scientists in Germany have doubt on a previously believed assumption that the processing speed of our brain to decline from the age of 20. Until now, it has been that our cognition level when we are 20 and declines thereafter. Lead researcher doctor Mischa von Krause, of Heidelberg University, hope to older people who worry about increasing forgetfulness or brain power. He said cognitive skills were still powerful at the age of 60 and do not before then. He wrote: "Our finding is , as our results show that average levels in mental speed in contexts fast and forced decisions do not until relatively late in the lifespan."

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