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The biological model assumes that propensity of aggression is located within the biological makeup of
an individual rather than in the environment.

The study of aggression on nonhuman animals helps us understand aggressive behaviour in humans.
E.g selective breeding has been found to lead to more aggressive behaviour in…

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Supporting the idea that there is a specific gene for aggression (Caspi et al., 2002), investigated 500
male children and found that those with low levels of MAOA and consequently low levels of serotonin
exhibited antisocial behaviour, only if they had been maltreated. Maltreated children with high levels of


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