The first assumption of Biological Approach
Genes influence our behaviour.
The second Assumption of Biological Approach
Biological structures, such as the brain and the nervous system are the most important systems for production of behaviour and experinces of mental events.
The third Assumption of Biological Approach
Brain chemistry influences behaviour - chemical processes in the brain are responsible for psychological functioning and an imbalance of chemicals in the brain may cause certain types of mental disorders e.g. schziophrenia.
The fourth Assumption of Biological Approach
Human haves evolved biologically through darwinian evolution and have much in common with other animals - especially those close to us on the 'evolutionary tree'.
The fifth Assumption of Biological Approach
There is behavioural continuity between species, meaning it makes sense to study animal species and make generalisations to humans.