Biological Approach Flashcards Preview

A2 Approaches AQA Psychology > Biological Approach > Flashcards

Flashcards in Biological Approach Deck (10)
Loading flashcards...

Assumes behaviour has a biological cause
Scientific methods brain scanning and lab ex
Role of genes on behaviour

Some mental illness thought to have genetic contribution, some to result of inheritance eg schizophrenia 1% but around 54% with an MZ twin with the inless


Must study the interaction of genes in the environment

Genotype, genetic code
Phenotype, observable characteristic affected by environmental factors


Role of biological structures like the brain on behaviour

Case studies of brain damaged individuals reveal certain things about the function of different regions
Phineas Gage, frontal lobes, aggressive and impatient = personality and planning


The role of neurochemistry on behaviour, influence of horemores

Many schizophrenia patients have excess levels of dopamine suggests it is involved in rational and organised thinking



Organisms change over time in order to adapt to their environment, some are naturally selected because they promote survival


Research suggests suggests mate preferences are a product of evolution

Males have evolved to prefer signs of attractiveness and youth as it increases chances of bearing children, reproductive success


Practical applications

Mental illness linked to the imbalance of neurotransmitters
Antidepressants increases levels of serotonin and reduce symptoms of depression (50-65%) improvement with drug treatments
Improve lives of people in the real world, valuable



Experimental method, highly controlled, replicable
Neuroimaging is objective
Credible and accurate conclusions that are based on more than just common sense


Methodological issues of supporting evidence

Concordance rates suggest there must be other environmental explanations of behaviour
High concordance rates in MZ similar child rearing
Cause and effect cannot be established, incomplete



Behaviour through genes and structure
Environmental factors ie upbringing
Oversimplifies causes of behaviours which may be interactions