XYY syndrome
- Created by: tomtom11
- Created on: 31-10-16 19:57
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- XYY syndrome
- Issues and debates links
- Reductionism
- Fouses only on genes and their role with aggression
- Underplays complicated relationship in genetics between environmental factors.
- Psychology as a science
- Used genetic testing to confirm data as objective.
- Theory only really makes one link between XYY and ASB, thus meaning it's hard to establish cause and effect.
- Thus, not that scientific
- Gender
- Only considers ale, and there is a lack of an explanation for female criminal behaviour
- Nature/nurture
- nature, as it is pre-determined by genetics.
- Has social element due to the characteristics of the syndrome leading someone to be labelled at ASB which leads to SFP
- Social Control
- If it were found that XYY syndrome predicted criminal behaviour, testing and control in children's lives could increase.
- Reductionism
- Description
- Male-exclusive
- Abnormalities that often occur with the 23rd chromosome pair
- XYY is one of these
- occurs in 1/1000 males
- XYY is one of these
- Defining physical characteristics = growing taller and faster, slightly lower intelligence (still within normal range), behavioural problems, easily distracted.
- Jacob et al (1965) suggested there was an over-representation of XYY men in prison populations due to aggressive behaviour.
- Also that there are 15 XYY for every XY
- Known as Jacob's syndrome
- Also that there are 15 XYY for every XY
- Weaknesses
- Unlikely to know true extent of prevalence of XYY, as it's not practical to look at the genes of all offenders
- requires skills staff + is intensive.
- Doesn't account for female criminals
- Witkin et al (1976) studies 4591 Danish men + found 12 cases of XYY (already unlikely)
- difference not significant in terms of criminal behaviour when background variables were ontrolled
- May be social reaction that cause criminals to flourish.
- Stochholm et al (2012) studied 161 XYY and 934 XXY men aged 15-70.
- Differences in crime rate between XXY/XYY people and controls were very low- some showed increase such as sexual abuse + aros
- Raised risk of conviction was more likely to be down to socio-economic conditions that related to having other syndromes
- Unlikely to know true extent of prevalence of XYY, as it's not practical to look at the genes of all offenders
- Issues and debates links
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