... helpful in certain cases, but has little to offer in others - most psychologists with an interest in biology would agree that while biological explanations are helpful, not everything can be explained in these terms. An integrated approach is needed - biological and psychological processes interact in complex ways, and looking at biological processes along with environmental effects gives a better understanding in many areas of psychology. This integrated perspective is termed the biological psychology approach (Toates, 2002) An understanding of biological processes can begin to explain how the functioning of the brain and nervous system, along with the environment, lead to specific behaviours. The biological approach can help explain psychological conditions such as depression, issues of cognitive interest - how the brain works during different types of behaviour, and can even shed light on differences in our personalities. Depression provides an excellent example of how a biological process can illuminate ...

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