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Psychology unit 4 revision (schizophrenia)

Biological explanations for schizophrenia

Suggests that 1 or more of our genes we inherit from our parents can put us at
risk of schizophrenia.



Investigated the concordance rates between a schizophrenic individual and
their family of having schizophrenia.
Found that monozygotic twins who…

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Psychology unit 4 revision (schizophrenia)

Conflicting evidence- genetic influence of MZ twins varies between studies.
Gottesman showed concordance rates of 48% whereas this study shows them
as 39%. Therefore results are not reliable due to the differences so we
can't be sure genes affect the chances of schizophrenia.

Kety et…

Page 3

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Psychology unit 4 revision (schizophrenia)

Only looked at the genetic link between children and mothers, not fathers.
Therefore we can't be sure of the father's genetic influence on the chances
of the child getting schizophrenia.

Genetic breeding of mice


Breeding mice to be schizophrenic by turning off the gene…


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