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Describe and evaluate two research methods:
Twin studies and Animal studies

Describe twin studies
Researchers study MZ twins because they share 100% of their DNA, in order to
investigate the influence of genes and see if there is a genetic predisposition to
The findings from this are then compared…

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Describe Animal studies
Carried out in highly controlled lab conditions
Group of genetically similar animals as a control
IV is manipulated e.g stressful environment
DV is measured, e.g schizophrenia development
Can establish cause and effect due to high controls
Extrapolate to humans as they share the same basic physiology



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