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Scientists have discovered that people who are optimistic about the future may have “faulty” brains. Their study, in the journal Nature Neuroscience, concluded that the many people always see light at the end of the may be because of an inability to sensibly with risk. They even say this over-optimism could have been a of the 2008 global financial crisis, with bankers failing to accept or the riskiness of their investments. Report author Dr Tali Sharot of London’s University College analyzed brain to measure the activity taking in patients who were asked to think about their future. He found that predictions were ignored in the of optimists.

In the study, Dr Sharot gave volunteers 80 different negative situations from unpleasant to disastrous. These included getting , having your car stolen and cancer. Many of the volunteers underestimated the of these situations happening to them. Dr Sharot said: "The more optimistic we are, the less we are to be influenced by information about the future." He added: “Smoking kills messages don't work as people think their chances of cancer are . The divorce rate is 50%, but people don't think it's the same for them." He also said: “Seeing the as half full rather than half empty can be a positive thing. It can stress and anxiety and be good for our health and well-.”