Playing the piano is a good example of an activity which most people have to be taught. But some people seem to be able to learn without any formal tuition. So what happens to our brains when we learn without even being aware of it? Unconscious learning is the process of learning without necessarily being able to describe what it is that you have learnt. Dr Harry Witchel is a senior research fellow at the University of Bristol. He's particularly interested in using neuroscience to learn about unconscious behaviour. Dr Witchel uses a similar experiment to that used with a lie detector to measure the unconscious learning taking place in response to a series of stimuli that are either good or bad.

Video Series: Brain
Release Date 2007