XYY Syndrome AO3

• +15/1000 people in prison have XYY syndrome compared to 1/1000 people in the general population. This shows that the majority is in prison, this can be inferred to support that XYY makes men more aggressive.
• +Adler suggests that aggressive behaviour is partly determined by genetics. This supports the existence of XYY theory.
• -Jacobs’s study looked at men imprisoned in secure psychiatric hospitals so the data is unrepresentative of the prison population of people with XYY.
• -Skinner would argues that XYY syndrome ignores the behaviourist approach and that nurture has a tremendous role on the way a person carries themselves in life. They could’ve learnt to be aggressive from observing interactions between family members or friends.
• -This could cause stereotypes to arise for people with XYY syndrome which would cause them to be treated as aggressive from the get go.
• Hirshi concluded that now most people see it as a diathesis stress model, where the environment is seen as a factor that can trigger a person's predisposition to XYY syndrome.