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Biological model of abnormality
Assumes that psychological illness is physical illness with physical causes.

The causes may be:

1) Genetic faulty genes are known to cause some diseases that have psychological
effects.
2) Neurotransmitters too much or too little of a particular neurotransmitter may produce
psychological disorders.
3) Infection disorders…

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Adoption study

Heston (1966) conducted an adoption study

Method 47 adopted children whose biological mothers had
schizophrenia were studied. A control group contained 50 adopted
children whose biological mothers didn't suffer from schizophrenia. The
children were followed up as adults and were interviewed and given
intelligence and personality tests.

Results…

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Strengths-

1) It had a scientific basis in biology
2) Lots of evidence shows that biological causes can
produce psychological symptoms.
3) Biological therapies have helped relieve conditions
that couldn't be treated well previously.
4) Ethical- person is not blamed for their disorders.



Weaknesses-

1) Ethical concerns- Drugs can cause…

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