Psychology is the science of the mind and behaviour and its reputation as a scientific subject has been steadily growing over the years. It is taught at numerous universities throughout the UK and these institutions offer courses ranging from Clinical Psychology to Animal Psychology and Forensic Psychology to Educational Psychology; all of which provide a wide expanse of career opportunities. As a subject it also lies at the intersection of many other different disciplines, including biology, medicine, linguistics, philosophy, anthropology and Sociology. But how can we study something as complex and mysterious as the mind? Even if we were to split open the skull of a ‘willing’ volunteer and have a look inside all we would see is the grey matter of all their neurones. We cannot see what someone is thinking. Nor can we observe their internal emotions, memories, perceptions or dreams.