According to the biological perspective, all behaviour must have physiological basis and in order to understand human functioning and behaviour, one must focus on the basic physiological processes, which underlie it. The biological perspective of psychology covers studies of the relationship between behaviour and the body, particularly the brain. There are two major concerns that this approach deals with: the relationship between mind and body, and the influence of heredity on behaviour.

Throughout history psychologist have been developing different techniques in order to study the brain and be able to predict, control and explain behaviour. There have been primitive methods, from the modern point of view, such as phrenology, developed by Franz Gall in the early 1800s, which thought that by measuring the bumps on people's skulls one might be able to relate them to various behaviour characteristics. Another method was lobotomy, where the frontal lobes were disconnected...