Scotland is about to make one of the most important decisions in its history. On the 18th September, people will vote to decide if Scotland becomes an independent country. Ken MacDonald explores what psychological techniques both campaigns are using to influence how people will make up their minds ahead of this historic vote. By speaking to leading neuroscientists and those campaigning on both sides of the debate, and by conducting research, this programme attempts to determine the factors which affect the way people come to conclusions. Neuroscientists believe that when people are faced with making important decisions, a range of emotional, psychological and neurological factors affect the outcome. Using the latest technology to tap into people's subconscious, it is now possible to determine how a person might vote before they even realise it themselves.