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Psychopathology (schizophrenia)

Biological explanations for schizophrenia: genetic explanation

Suggests that one or more of our genes we inherit from our parents can put us at
risk of becoming schizophrenic.



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

Page 2

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Psychopathology (schizophrenia)

Conflicting evidence- genetic influence of MZ twins varies between studies.
Gottesman showed concordance rates as 48% whereas this study showed
them as being only 39%. Therefore results are unreliable due to the
differences so we cannot be sure that genes do affect the chances of
developing schizophrenia.


Page 3

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Psychopathology (schizophrenia)

Lack population validity- only taken place in Finland. Therefore results
cannot be generalised to other countries as those countries may use
different books to diagnose schizophrenia, meaning the findings would not
be valid when using different definitions of schizophrenia.
Only looked at the genetic link between children and…


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