P: Uses scientific methods, particularly experiments.

E: These are objective and take place in highly controlled environments.

E: Therefore, making the findings replicable and reliable.

P: Evolution can be applied to explain a range of behaviours

E: e.g. can explain sex differences in attraction and aggression

P: lots of research support - twin, adoption

P: Sees human behaviour as only caused by internal, genetic causes.

E: As we have no control over our genetics it suggests we have no free will over our own behaviour

E: The biological approach can be seen as deterministic.

P: Can be seen as too simplistic

E: as it tries to explain complex behaviours in simple terms, ignoring things like emotions

E: Therefore, the biological approach is reductionist.

P: Does not explain cultural differences

P: Difficult to research

E: Difficult to isolate biological and environmental influences