Psychology is a science, the science of the mind. The human mind is the most complex machine on Earth. It is the source of all thought and behaviour. Psychologists use human behaviour as a clue to the workings of the mind. Although we cannot observe the mind directly, everything we do, think, feel and say is determined by the functioning of the mind. So psychologists take human behaviour as the raw data for testing their theories about how the mind works. For example, neuropsychology is allied with biology, since the aim is to map different areas of the brain and explain how each underpins different brain functions like memory or language. Other branches of psychology are more closely connected with medicine. Health psychologists help people manage disease and pain. Similarly, clinical psychologists help alleviate the suffering caused by mental disorders. The study of Psychology at university is now one of the most oversubscribed courses: career opportunities for those with good degrees are numerous. Many students use Psychology A Level for other subjects ranging from Art to Veterinary Science. Cross-curricular in nature, Psychology combines both Humanities and Science in an exciting way.