The Biological Approach

The biological approach argues that behaviour can be explained in terms of physical, biological factors. It assumes that everything psychological is first biological — that the mind resides in the brain, and that behaviour, cognition, and emotion all have biological causes that can be studied scientifically.

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Key Assumptions

1. All behaviour has a biological basis — it can be explained in terms of brain structures, neurochemistry, genetics, and evolution.
2. The mind lives in the brain — all thoughts, feelings, and behaviour are the product of brain activity.
3. Genetics influence behaviour — behavioural characteristics can be inherited, just like physical characteristics.
4. Human behaviour can be explained through evolution — behaviour that promotes survival and reproduction is naturally selected.

Key Definition: Biological approach — the approach that explains behaviour in terms of biological factors including genetics, neurochemistry, brain structures, and evolution. It assumes that all behaviour has a physical, biological cause.

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Genes and Behaviour

The Role of Genetics

Every individual inherits a unique combination of genes from their parents. The biological approach proposes that genes influence behaviour, personality, and susceptibility to mental disorders.