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If you're not sure about something how do you make a decision? Who should you believe if you rely on others to help you decide? Researchers have found that if someone appears confident then we are likely to be influenced by them - our brains literally tune in to confident people. Psychologist Dr Dan Campbell-Meiklejohn from the University of Sussex has scanned the brains of people and discovered that they assess the confidence of others using a specific part at the front of the brain, in the prefrontal cortex. Claudia Hammond finds out more.

First broadcast on All in the Mind, 24 May 2017.